How can you see how much bar/psi you have left if the gauge is on your back?

For the S400 series, we recommend that you carry the bag on your chest to check the pressure gauge. If you don’t like this, I suggest you buy the latest S400 PRO, this one uses an extended pressure gauge and a waist pack, you can check it through the extended pressure gauge.

Is this a disposable mini scuba tank?

no we bought this one on purpose so we can refill it

What about buoyancy? how can you control your buoyancy without bcd? will the tank drag you down?

I deleted two answers... A filled tank (200 bar or 3,000 psi) - may it be S700, S400 1.0L or S300 - will go down to the bottom. It has a negative buoyancy. An empty tank won't ascend from the bottom, but it will take an upside down position, its buoyancy is much less negative. Attached to you it "might" affect your buoyancy, but that depends on your own buoyancy. Buoyancy control depends on your buoyancy, and that from your weight, bodyfat ratio, gear weight, salinity etc.

Are these air tanks allow on planes

Yes, if you can show that the first stage regulator is unscrewed from the tank. Airlines are concerned with pressurized tanks.

Smaco S400 Mini Scuba Tank 1l Portable Diving Lung Air

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Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

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¥115226

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Sold byAmazon JapanDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🌊 Dive Deeper, Travel Lighter — Your Mini Air Tank for Every Adventure!

BREATHE EASY DIVE SAFER - Constant pressure exhaust + explosion-proof device ensures smooth, secure air flow every dive.
VERSATILE REFILL OPTIONS - Fill your tank locally, via SMACO compressor, hand pump, or quick adapter in minutes.
COMPLETE DIVE KIT INCLUDED - 1L pony bottle, harness, and hand pump all in one package—ready for your next underwater adventure.
TRAVEL READY DIVE COMPANION - Compact, disassemblable design lets you board planes and dive worldwide without hassle.
RELIABLE AIR SUPPLY ON DEMAND - Delivers approx. 75 clean breaths with double-layer filtration for impurity-free air.

The SMACO S400 Mini Scuba Tank is a 1L portable, DOT-certified aluminum pony bottle designed for safe, reliable breathing up to 16 ft depth with approx. 75 breaths at 200 bar. Featuring explosion-proof technology and a double-layer filtration system, it ensures clean air supply. Its compact, disassemblable design is airline-friendly, perfect for travel and emergency backup. Multiple refill methods and a complete kit make it ideal for recreational diving, pool training, and underwater tasks.

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¥115226

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

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TrustScore 4.5 | 7,300+ reviews

Neha S.

Excellent communication throughout the order process. Product is perfect.

2 weeks ago

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Item Package Dimensions L x W x H	13.78 x 9.84 x 9.84 inches
Package Weight	3 Kilograms
Brand Name	SMACO
Manufacturer	SEBiger
Part Number	S400
Style	E-green

SMACO S400 Mini Scuba Tank, 1L Portable Diving Lung Air Tank

Description

Specifications

Common Questions