SMACO Scuba Tank Oxygen Cylinder Diving Gear for Diver Mini Scuba Tank with 5-10 Minutes Capability Diving Oxygen Underwater Breathing Device 0.5L Diving & Snorkeling Equipment

Firstly; Extracting pure ‘Oxygen’ from air is an expensive process which is not achieved with a hand pump!Secondly; Scuba divers do not use 'Oxygen' cylinders except in cases of emergency at the surface. Instead, they use 'Compressed Air.' This is ordinary air found above ground level anywhere in the world which is then compressed (with the use of an expensive 'Compressor') into the diving cylinder at great pressure. In simplistic terms, that compressed air is then eked out little at a time, to the diver throughout the length of the dive.Leaving aside all other issues I will explain the maths. The air we breathe is made up of 21% Oxygen which, when breathed at depths of over 85 metres (approx 275 feet) turns toxic (i.e. poisonous!) and will kill. BUT!, if those same diving cylinders were filled with 100% Oxygen it turns toxic at depths of just 10 metres (33 feet!) as any competent diving instructor will explain.One customer has asked if this is all the equipment his children need for scuba diving in their swimming pool. I wonder if he’s now checking the depth!!!If the manufacturers of this questionable item of equipment do not understand the basics of oxygen, air, depth and scuba diving in their most rudimentary forms they should NOT be making such equipment. Avoid all contact with this device. It is clearly not fit for purpose and certainly not fit for the minimum one star rating I am required to give.NM(Active diver/instructor for over 40 years)

SWIMMING POOL

Wenn man dieses Gerät nutzt dann sollte man sich mit dem tauchen wirklich gut auskennen. Ansonsten kann so etwas sehr gefährlich enden. Die Handpumpe funktioniert zwar aber ist quasi unnütz.... Außer man nutzt es anstelle des Fitnessstudios. Unglaublich anstrengend! Besser einfach die Finger davon lassen!

Bonjour à tous , intrigué pat cette petite bouteille j’ai décidé de la commander ! Matériel reçu, rien de compliqué ds le montage , je ne la gonfle pas en attendant les vacances . Arrivé en vacances je teste le gonflage ( je savais que c’était sportif ) et là mauvaise surprise le détendeur fuit ! 'est comme si vous gonfliez un pneu crevé., impossible de s’en servir . Ayant quelques bases de plongée j’avais acheté cette bouteille en connaissance de cause et sur la dangerosité à mal l’utiliser mais dans mon cas c’est réglé ; elle ne sert à rien. J’espère pouvoir retourner l’article car très déçu,

At first i loved it but now it's only been 30 days and it won't hold the air for more than a few hours. So i have to fill it right before i want to use it. The to contact seller but it won't let me. Not happy don't buy

Je n’ai pas de notice de montage en français !!!