Bluetooth Speaker Feature AUX in: Provide 3.5mm audio/headphone jack connection, so you can also use this speaker if your device is not bluetooth enabled. Rechargeable Li-on battery: Build-in lithium battery. Bluetooth Speaker Spec Input power: DC5V/500mA Rechargeable battery: 3.7V/500MAH Dia 6358mm (legs not included). Materials: ABS/Metal/TPR Bluetooth. Simplified method to discover and connect to the speaker and immediately enjoy high quality wireless stereo music. Bluetooth spec Bluetooth V3.0 EDR Bluetooth protocals: A2DP 1.2,AVRCP 1.0,HFPV1.5. Transmission range: >10 meters Transmission speed: 1~3Mbps Speaker spec Experience amazing sound produced by digital sound Amp Technology developed by audio specialists and acoustic engineers. Sound track MonoSpeaker: Dia:40mm,3W1pc, anti-magnetic. Passive speaker: Dia: 40mm 1pcs Accessories: Audio cable USB cable LYB-021Lwith 6 magic twist legs.