This product is fairly light and thin with powerful functions. It supports android, IOS dual system, GSM voice communication and voice dialing. It also owns the following functions;such as ringing reminder,button answering, call speaker,bluetooth anti-lost and so on. The Longest standby time of its battery can up to three days,calling time up to 2 hours. What's more,the product also be added two-way voice calls, dual position, comfortable waterproof, Bluetooth accompanied, SOS, Emergency, real-time listening, security zones, view the track, school disabling into it.