--- product_id: 475855375 title: "CS40 (2-IN-1)" brand: "crust" price: "¥428" currency: JPY in_stock: true reviews_count: 8 url: https://www.desertcart.jp/products/475855375-cs40-2-in-1 store_origin: JP region: Japan --- # 10X larger mic with noise suppression Bass booster for immersive sound Bluetooth 5.3 for crystal-clear audio CS40 (2-IN-1) **Brand:** crust **Price:** ¥428 **Availability:** ✅ In Stock ## Summary > 🎧 Elevate your audio game—wireless freedom meets pro-grade clarity! ## Quick Answers - **What is this?** CS40 (2-IN-1) by crust - **How much does it cost?** ¥428 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/475855375-cs40-2-in-1) ## Best For - crust enthusiasts ## Why This Product - Trusted crust brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Instant Bass Boost:** One-touch bass enhancer for that rich, immersive sound experience on the go or at home. - • **Voice Assistant Ready:** Supports Siri & Google Assistant for hands-free control and smarter multitasking. - • **Universal Compatibility:** Works effortlessly with your car stereo, TV, PC, and any 3.5mm aux device. - • **Crystal-Clear Hands-Free Calls:** 10X larger mic plus noise suppression means your voice is always heard, not the background. - • **Seamless 2-in-1 Bluetooth Magic:** Transform any aux device into a wireless powerhouse with transmitter & receiver modes. ## Overview The CRUST CS40 is a compact, lightweight Bluetooth 5.3 transmitter and receiver that converts any 3.5mm aux device into a wireless audio hub. Featuring a 10X larger noise-suppressing microphone for crystal-clear hands-free calls, a one-touch bass booster, and seamless compatibility with cars, TVs, and PCs, it’s designed for professionals who demand premium sound and smart connectivity on the move. ## Description Full description not available ## Features - Go Wireless: - Enjoy Wireless Music & Hands Free Calls in your Car & Home with this 2 in 1 Bluetooth 5.3 Transmitter & Receiver. Transform your non-bluetooth Car Stereo, TV, Speakers and more into Bluetooth enabled devices. - Receiver Mode: - Connects to your Car Stereo / Speakers via aux cable and receives audio from your smartphone via Bluetooth - Transmitter Mode: - Connects to your TV / PC via aux cable and transmits audio to your Bluetooth earphones / speakers - 10X Clearer Hands Free Calls: - Single Key Answer in addition to an extra-large in-built Microphone with noise suppression ensures Crystal Clear Hands-Free Calls - Exceptional Features: - Single Key Bass Booster, Siri / Google Assistant Support, Private Calling and a lot more - For Technical Support WhatsApp us on +91-93241 53298 (Mon-Sat 10AM-6PM). ## Technical Specifications | Specification | Value | |---------------|-------| | Brand | CRUST | | Manufacturer | CRUST, Encasers, Lakhi Industry House, LBS Marg, Bhandup West, Mumbai - 400078. Contact: +91 9324153298 | | Model | CS40 (2-IN-1) | | Model Name | CS40 | | Product Dimensions | 5.8 x 3.3 x 1.35 cm; 36.5 g | | Item model number | CS40 (2-IN-1) | | Hardware Interface | 3.5mm Audio, Bluetooth 5, USB | | Compatible Devices | Smartphone, Speaker, Television | | Special Features | Hands-Free Calls | | Number of items | 1 | | Audio input compatible with the item | 3.5mm AUX | | Audio output mode | Stereo | | Audio Output Type | Speaker | | Microphone format | Built-in | | Power Source | Adapter | | Batteries Included | No | | Batteries Required | No | | Type of cable or wire | AUX and USB Cable | | Wireless Type | Bluetooth | | Connector Type | AUX, Bluetooth | | Compatible media type | Bluetooth 5.3 | | Media type | Audio | | Includes Rechargeable Battery | No | | Includes remote | No | | Supports Bluetooth Technology | Yes | | Manufacturer | CRUST | | Item Weight | 36.5 g | ## Product Details - **Special Feature:** Hands-Free Calls - **Brand:** CRUST - **Connectivity Technology:** AUX, Bluetooth - **Power Source:** Adapter - **Product Dimensions:** 5.8L x 3.3W x 1.4H Centimeters ## Images ![CS40 (2-IN-1) - Image 1](https://m.media-amazon.com/images/I/61KTUodCGDL.jpg) ![CS40 (2-IN-1) - Image 2](https://m.media-amazon.com/images/I/71wSKF0-7AL.jpg) ![CS40 (2-IN-1) - Image 3](https://m.media-amazon.com/images/I/61u4ohSwHiL.jpg) ![CS40 (2-IN-1) - Image 4](https://m.media-amazon.com/images/I/61bE0STbiFL.jpg) ![CS40 (2-IN-1) - Image 5](https://m.media-amazon.com/images/I/61btKaAuR8L.jpg) ## Questions & Answers **Q: spkr has no aux facility but is bluetooth, so how do connect your bluetoothless TV ?** A: In Transmitter mode CS40 will connect to your TV via the AUX out port on your TV and will connect to your speakers via Bluetooth. Please check the setup instructions in the User Manual. You can also search for Crust CS40 on YouTube and check out the videos. **Q: Is this compatible with Bluetooth enabled hearing aids? They use BLE 5.1 Bluetooth protocol.** A: No idea . It get connect with your phone very efficiently **Q: Is there any audio delay when connecting to tv? does the audio transmitted match the video when listening via bluetooth headphones?** A: Our device supports latest Bluetooth v5.3. It works with negligible lag with latest TVs and earphones. You can check out videos on YouTube to better understand how our product works. **Q: Does it come with stick pad / some provisions to fix?** A: Yes, it comes with 2 stickpads, with velcrow on one side, do you can take the device out and put in another place if needed. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Perfect for Honda Amaze 2013 *by R***O on 14 April 2025* Good and easy to install, compatible with Honda Amaze 2013 model, we have to switch the selection to AUX mode and play any audio from mobile device.Compact in size, adhesive is not good, though they have given 2 quantity.Easy to connect and functionality is too good, clear sound and voice quality.If you are playing FM or USB songs then during calls just switch the mode to AUX from Honda Amaze console to receive the calls.Troubleshooting Guide:If you're not getting any audio after successfully pairing with mobile then do check the audio volume in the mobile phone and increase it. Initially I found there's no audio in the car and after checking options from mobile phone able to fix it. ### ⭐⭐⭐⭐ Fantastic Bluetooth Receiver – Clear Sound, Sleek Design & Easy Setup! *by O***R on 17 June 2025* I’ve been using the CRUST CS40 Car Bluetooth Receiver for a few weeks now, and I must say it has exceeded my expectations in every way.First off, the sound quality is excellent. Music comes through crisp and clear, and there's a noticeable improvement in clarity over older Bluetooth receivers I’ve used. The added Bass Boost button is a nice touch—it gives your music that extra punch, especially if you enjoy a richer, fuller sound while driving.What really impressed me is the mic sensitivity. Even with normal conversation volume, the person on the other end hears me loud and clear, regardless of whether I’m driving alone or with passengers. Everyone in the car can speak naturally without needing to raise their voice, which is a huge plus for hands-free calls.The design is minimal and elegant, and the build quality feels premium—nothing feels cheap or flimsy. The Bluetooth 5.3 support is another big win. Connection is rock solid with no dropouts, and pairing was incredibly simple. It literally took me less than a minute to set everything up, and using it daily is hassle-free.One thoughtful detail is the length of the wires. They're long enough to allow flexible placement anywhere on the dashboard, so you can keep things neat and tailored to your car’s layout.The only thing that felt off was the packaging. The unit came in a plain brown cardboard box, which looked a bit like a returned or previously opened product. After seeing other reviews with better-looking packaging, it raised a few questions. I think the seller should clarify in the product description if this is standard packaging or not, to avoid confusion.All in all, this is a well-rounded, well-built Bluetooth receiver that delivers on all fronts. If you’re looking for something that’s reliable, sounds great, and is easy to use, I’d highly recommend the CRUST CS40. ### ⭐⭐⭐⭐⭐ Must Buy product *by S***E on 29 June 2025* Very good product with lots of useful functionalityCompatibility is unbelievable overall experience is awesome.For Car it is very good product turns your cars audio experience wireless instantly. ## Frequently Bought Together - CRUST CS40 Car Bluetooth Receiver, BT v5.3 Transmitter Receiver Device for Handsfree Calls, Music System; 3.5mm Aux Jack Adapter for Car,TV,PC & More; 10X Larger Mic, Bass Booster, Voice Assistant - Duracell 36W Fast Car Charger Adapter with Dual USB Port. Qualcomm Certified 3.0, Quick Charge. Compatible with iPhone, All Smartphones, Tablets & More - Copper & Black - Godrej aer O – Hanging Car Air Freshener – Assorted Pack of 3 (22.5g) | Gel Lasts up to 30 days | Car Accessories --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.jp/products/475855375-cs40-2-in-1](https://www.desertcart.jp/products/475855375-cs40-2-in-1) --- *Product available on Desertcart Japan* *Store origin: JP* *Last updated: 2026-05-23*