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.

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🌊 Dive Smart, Breathe Confidently – Your Mini Tank for Big Adventures!

SAFETY FIRST ALWAYS - External explosion-proof valve design maximizes your peace of mind during every dive.
CLEAN AIR CLEAR MIND - Triple-layer filtration system blocks dust and impurities for the purest underwater breathing experience.
BREATHE EASY DIVE LONGER - Constant pressure air outlet ensures effortless breathing for up to 20 minutes underwater.
TRAVEL READY DIVE COMPANION - Compact 1L tank disassembles for hassle-free airplane transport—dive anywhere, anytime.
VERSATILE INFLATION OPTIONS - Four inflation methods including quick-fill adapters and hand pumps to keep you ready on the go.

The SMACO S400 Mini Scuba Tank is a compact 1L diving oxygen cylinder designed for 15-20 minutes of underwater breathing. Featuring a constant pressure air outlet and an external explosion-proof valve, it prioritizes safety and ease of use. Its triple-layer filtration ensures clean air intake, while its disassemblable design makes it airplane-friendly for global underwater exploration. Certified by DOT/CE, it supports multiple inflation methods, making it the perfect portable backup air source for diving, emergency rescue, and underwater tasks.

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Yes, all products are sourced directly from authorized retailers in the US, UK, UAE and India. We maintain strict quality control processes and verify each product before shipping. All items come with applicable manufacturer warranties and are covered by our standard return policy.

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Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

₨8195

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Style	S400-A-GREEN
Team	Smaco
Batteries Included?	No
Brand	SMACO
Manufacturer	SMACO
Item model number	S400
Package Dimensions	41 x 33.29 x 15 cm; 3.04 kg
ASIN	B08HHHDSZT

SMACO Mini Scuba Tank 1L Small Scuba Tank Diving Oxygen Cylinder with 15-20 Minutes Underwater Breathing Portable Diving Tank Kit for Underwater Exploration Emergency Rescue Pony Bottle S400

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