*Play music via Bluetooth.*Soft slicone surface get soft feel.*Waterproof，dustproof and shockproof.*Small size convention to carry away.*Voice prompt.*Stainless steel speaker mesh.*Support MP3/WMA/WAV format.*Support lossless Audio in Ape，Flac format.*Different colors for choice， mixed color order welcome*Customized logo or design is highly welcomedBluetooth Compliance Bluetooth 3.0+ EDROperation distance ��10MOperation frequency 80HZ-20KHZImpedance 4��Output Power 3W Audio Signal -Noise Ratio >80 dB USB Charging Voltage DC 5VWorking Voltage 3.7VBattery capacity Rechargeable 400mAh ithium-ion batteryWorking Time 3-5 hours on medium volume Audio Input Bluetooth&Line-inCharge time 1.5-2 hoursMaterial ABS +Plastic+SiliconePackage100 pcs/carton; Carton size: 55 x 38 x 32.5cmProduct Size 188*50*50 mmN.W/G.W63g/110g