S300Plus 0.5L Mini Scuba Tank Refill Tool:Refill Adapter Its modular design lets you

Its modular design lets you convert it into two separate 2L tanks

or safety valve

while the dry-top snorkel automatically seals underwater to prevent water entry

always monitor the pressure gauge and do not exceed 10 meters (33 ft)

S300Plus 0.5L Mini Scuba Tank Refill Tool:Refill Adapter Its modular design lets youThe S300Plus delivers smooth, controlled airflow in a compact design built for quick dives and backup use. Its integrated respirator includes a high performance pressure reduction system that regulates output to around 2 MPamaking breathing feel more natural and effortless. With the regulator, gauge, safety valve, vent, and mouthpiece all housed in one lightweight unit, the S300Plus keeps your setup simple, portable, and ready for adventure. CE, TUV,