Main Features: - Wireless Bluetooth design, free your hands from now on - Compact and round appearance, fashionable and distinctive - Super portable, fitting into your bag or pocket easily - Support micro SD card and USB - Built in microphone for hands-free calls or voices chat - With FM function - Support line in and line out - Powered by built-in lithium ion battery - Compatible with all Bluetooth enabled devices such as phone, pad, PC and so on Features: colorful lights flashing LED, Bluetooth wireless broadcast, FM radio, hands-free calls, AUX audio input, U disk, SD card, headset jack output. Bluetooth version: Bluetooth Bluetooth 2.1 Speaker: A, brand new 40mm Power: 4 3W Material: ABS shell. Mode of adjustment: press key. Operating voltage DC3.7V-4.2V Power supply mode: high quality A product, new double protection lithium battery (3.7V 400 MA) Playing time: medium volume, 2-3 hours or so Flushing time: 2 hours Charging voltage: limiting voltage DC5V Charging current: DC500-1000MA SNR: > 80DB Distortion rate: < 0.5%@ (1KHz) Frequency: 90Hz-20KHz Attention: - Do not place in hot or humid place, avoid direct sunlight Package Contents: 1 x Speaker, 1 x Cable