Ubit B90 Smart Watch Sports Bluetooth Speaker Hands-free Call TF Card Playing FM Radio Self-timer Wireless Speakers Time Display Sports Music watch Speaker with TF card playing mp3/wav format music This speaker owns excellent sound quality,with perfect audio design Multi-function Watch -with bluetooth self-timer/FM Radio/Alarm clock function/Stopwatch function Long Battery Life - built-in high-capacity li-ion battery for power supply,long standby time 1-3 MONTHS WARRANTY