Brand N/A Model U-1 Quantity 1 Color Black + orange Bluetooth Version V2.1 Operating Range 10 meter Compatibility V2.0 Microphone No Channels 2 Radio N/A Supports Music Format MP3 Power Supply Built-in Battery Compatible With Iphone / Ipad and other devices with Bluetooth Total Power 2W Impedance 4 ohm Signal to Noise Ratio(SNR) 85dB Sensitivity 85dB Built-in Battery Capacity 500mAh Other Features The blue light will flash as turn on; Interface: DC port; Bluetooth V2.1 + EDR frequency: 2.4G ISB band; Maximum transmission rate up to 2.1Mbps; Transmission range up to 10 meters (open area); Working time: 8 hours; It will auto power off if no operation in 5 minutes Packing List 1 x Bluetooth speaker 1 x USB charging cable (54cm)1 x Strap (24cm)1 x English user manual