When I plug my laptop into it, and then play music through my laptop I get really bad cyclical sound ... is there a way to filter this out?

I'm going with audio engineer dude on this one. But really what I wanted to address, is people saying it's due to it being a modified sine wave. That's not your issue. Laptops don't run on AC, they run DC, so first off sine type isn't an issue. Second, anything not straight off the main grid or a generator is a modified sine. There are better and worse, but if you're going DC to AC, it's modified sine. In all honesty though, if you're running a laptop off an inverter, the best thing would be to see if you can adapt straight from your original source to a laptop charger, bypassing the whole AC conversion.

The descriptions and photos here show TWO(2) AC Outlets, but some reviews say it only has ONE(1). Which is it?

The unit that I received has 2 110v outlets and 2 usb ports. The unit was used on a recent trip to Texas and worked flawlessly.

Will this drain the car battery and does the car need to be running to use this?

It depends. If you have an ICE car with an internal combustion engine and a small "starter/ignition" battery, you won't want to run anything more than a few hours, maybe less if your battery is older or you've run it to dead a couple of times already. But for my electric car, I've used a small inverter in the accessory jack to power small things for up to a week, and hardly noticed it.

Will this work with/charge a 15 inch Macbook Pro?

Yes it works very well, and runs quietly.

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BESTEK Power Inverter DC 12-17V to AC 110V - 300W Car Plug Adapter Outlet

Product ID: 234777

Details

Brand
BESTEK
Model Name
MRI3011BU
Power Source
DC
Wattage
300 watts

⚡300W continuous power

🔌2 AC outlets + 2 USB ports

🛡️Multi-layer safety protection

¥11438

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Sold byAmazon JapanDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🔋 Power up your journey with BESTEK — never run out of juice on the road again!

DUAL AC USB PORTS - Simultaneously power larger devices and fast-charge your USB gadgets with 2 AC outlets and 2 USB ports delivering 4.8A.
RUGGED ULTRA COMPACT - Durable aerospace-grade aluminum housing in an iPhone-sized design fits perfectly in your travel bag or glove compartment.
SAFE SILENT OPERATION - Built-in 40A fuse, multi-protection system, and smart cooling fan ensure quiet, reliable, and safe charging wherever you go.
POWER YOUR ROAD ADVENTURES - 300W continuous and 700W peak power to keep laptops, tablets, and more fully charged on the go.
TESLA COMPATIBLE VOLTAGE RANGE - Works seamlessly with 11-17V vehicles including Tesla models, SUVs, RVs, and sedans.

The BESTEK Power Inverter converts 12-17V DC to 110V AC with 300W continuous and 700W peak power, featuring 2 AC outlets and 2 USB fast-charging ports. Compatible with Tesla and most vehicles, it boasts a compact, durable aluminum design with advanced multi-protection and silent cooling. Backed by a 5-year warranty and ETL certification, it’s the ultimate travel companion for professionals on the move.

Specifications

ASIN	B004MDXS0U
Antenna Location	Charge for phone, laptop, camera, etc; compatible with 11-17V vehicles like SUV, MPV, RV, Seadan, Trunk, Tesla
Best Sellers Rank	#310 in Automotive ( See Top 100 in Automotive ) #2 in Power Inverters
Brand	BESTEK
Built-In Media	1 x 300W Power Inverter1 x User Manual
Color	Red
Customer Reviews	4.5 4.5 out of 5 stars (33,959)
Electrical Output Waveform	Modified Sine Wave
Energy Specifications Met	UL, FCC, CE
Frequency	60 hertz
Global Trade Identification Number	06950334926207
Input Voltage	17 volts
Inverter Capacity Volt-Amp	25
Item Dimensions L x W x H	4.8"L x 3.1"W x 1.9"H
Item Type Name	Power Converter
Item Weight	14.4 ounces
Manufacturer	BESTEK
Mfr Part Number	MRI3011BU
Model Name	MRI3011BU
Model Number	MRI3011BU
Number of Outlets	4
Output Power	300 watts
Output Voltage	120
Peak Output Power Watts	700
Power Source	DC
Standby Power Shutoff	83.33%
Unit Count	1 Count
Voltage	12 volts
Warranty Description	18 Months
Wattage	300 watts

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Trustpilot

TrustScore 4.5 | 7,300+ reviews

Ayesha M.

The product exactly matches the description. Very satisfied with my purchase.

5 days ago

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Good experience, but the tracking updates could be better.

2 months ago

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¥11438

Duties & taxes included

In stock

Sold byAmazon JapanDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Japan.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Meera L.

Smooth transaction and product arrived in perfect condition.

3 weeks ago

Vikram D.

The MOLLE sheath is of exceptional quality. Very happy with my purchase.

2 weeks ago

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