The YAMAHA 350Li is a full featured Seascooter that gets you cruising underwater with a top speed up to 3.7mph (6km/h).Easily shift between 3 rotational speeds as you conserve your energy for more bottom time. Automatic buoyance system, designed for salt water, allows you to concentrate on the scenery and not on your equipment.• Run up to 75 min with normal use• Rated to 130ft / 40m• Speed up to 3.7 MPH / 6 KM/H• 3-level rotational speed control• Battery level indicator• Superior flood prevention system• Powered by high performance replaceable Lithium Ion battery. (Upgradeable 500W battery available)• Automatic buoyancy adjustment• Weight only 19 lb / 8.6 kg including battery