Multifunction 4-in-1 bluetooth speaker whether in the drive or ride a bicycle whether it's travel or at home you can enjoy the music and LED lighting handsfree calls charging for other devices with USB connector. Clear the bluetooth stereo audio playback: Your mobile phone with bluetooth function or other electronic digital products play music wirelessly to bluetooth multi-function 4 in 1 sound. Using high density double core speaker high-frequency loud and uniform quality sound clear height make you enjoy high quality music. Bluetooth hands-free calls: Enable bluetooth multi-function 4 in 1 speaker can be quickly installed in the car visor or bicycle handle with your friends and relatives phoned in safety. High brightness LED lighting: Using high brightness LED energy-saving light bulbs long life. Can be used as a night bicycle light head and can enjoy MP3 music along the way mountaineering juyou's best partner. USB charging: suitable for digital products and mobile phones. Product parameters: Bluetooth version: V2.1; Talk time: 50 hours; Charging time: 3 hours; MP3 play time: 28 hours. LED lighting time: about 3 hours. The built-in rechargeable battery capacity: 2600mAh. LED power: 1W.