*Bluetooth wireless technology: support bluetooth music player;*AUX andio input: support computer，phone，M3，PAD，PSP connection*Different colors for choice， mixed color order welcome*Excellent Sound Performance*High quality with smooth surface*Customized logo or design is highly welcomedModel No. S-624 wood and bamboo speakerOperation distance ��10MOperation frequency 40HZ-20KHZImpedance 4��Output Power 5W*2 Audio Signal -Noise Ratio >65dB USB Charging Voltage DC 5VWorking Voltage 3.7V-4.2V+0.05VBattery capacity Rechargeable 850mAh ithium-ion batteryWorking Time 10 hours on medium volume Audio Input Bluetooth&Line-inCharge time 3-4 hoursMaterial Natural wood&bambooPackage50 pcs/carton; Carton size: 49.5 x 37 x 4cm