Live Castle Inside Every Sportsman U.S.D MIL-STD Certified | Two-Tone Liquid Silicone Rubber | 5ATM and IP69K Waterproof Certificate | 70 Sport Modes with Smart Recognition | Bluetooth Calling | 380mAh Battery Battery More rich functions to meet all your needs Sports, heart rate, breathing, sleep and other data monitoring procedures on this small screen. USA MIL-STD Quality, Be Strong & Brave Design and choice of materials The U.S.D MIL-STD-810H certified, TANK M2 has been proven to withstand all outdoor activities and extreme conditions, helping you face a lot of challenges directly. Special Two-Tone Liquid Silicone Rubber TANK M2 combines outdoor design with our own two color liquid silicone rubber mould. Its side body is embellished with color-blocking soft silicone rubber, making it a vibrant, robust smartwatch. Sturdy Metal Case Specially Made for Men. The frame and bottom of the TANK M2 are made of high-strength metal and stainless steel panel, which fixes the inner parts of the smart watch, also makes it highly resistant to vibration, fall and car crash. Thanks to its detailed design including Underwater Pressure Resistant Waterproof speaker and Microphone to 50m with 5ATM Certification, the TANK M2 has 5ATM certified static waterproof, meaning it can withstand equivalent to 50 meters of water pressure. Dynamic Waterproof with Impressive IP69K Certification. The TANK M2 has passed the rigorous IP69K rating test, so you can wear it in all daily sports and activities such as swimming, diving, surfing, mountaineering and more. Go Crazy with 70 Sports Modes and Smart Recognition of 6 Sports The TANK M2 supports up to 70 sports modes including walking, skiing, swimming, and other indoor and outdoor exercises. AC powered by our brand new sports algorithm