Features:Bluetooth Function USB、 TF Card Slot、 AV line in.Built-In FM Radio、Compatible with Laptop/MP3/MP4 Player and ExternalLithium Battery、Single Speakers、Built-In Microphone、Hands-Free Call Feature wireless bluetooth min X3 speaker Specifications:Channels: 2 (2.0)Output Power: 3W*1Driver: 1.5"*1Frequency Response: 150Hz-12KHzResistance: >600S/N: >65dBDistortion: <1.0%Frequency response: 100HZ-20KHZBluetooth Version: V3.0 +EDRAvailable range: 10 metersMaterial: ABS plasticWeight approx 200gSize:50mm*50mm*65mm