100% Brand New.Color: BlackDimension: 4.7 x 3.5 x 1cm (L x W x H)Jack: 3.5mm audio jackBluetooth: Bluetooth 3.0 V2.1+EDRBluetooth profiles: A2DP and AVRCPBluetooth frequency range: 2 .4GHz-2.4835GHzReceiving sensitivity: -74±4dBEffective range: Up to 10mCharging input voltage: DC 5VWorking time: Up to 10 hoursCharging time: About 2 hoursBattery: Built in Rechargeable BatteryWorks with the speaker which has 3.5mm line-in jack and play music from all devices enabled with A2DP stereo Bluetooth 3.5mm plug10 meters transmitter distanceWorking while chargingBuilt-in rechargeable lithium-ion batteryLow power consumption and long working timePlug and playCompact and light-weightedPackage Content: 1 x Bluetooth Audio Receiver; 1 x USB Cable; 1 x User ManaulNote: Due to the difference between different monitors， the picture may not reflect the actual color of the item. We guarantee the style is the same as shown in the pictures， but not the same performance on different bodies as on the model. Thank you!