Function : Features: - Bluetooth 5.0 technology for lower energy consumption but more stable connection and faster transmit speed - Bluetooth wireless design for connecting to any Bluetooth enabled smart devices - 400mAh rechargeable lithium-ion battery supplies longer playing time - Very easy to set up and use, your Bluetooth is ready, your music is ready - Play music directly from TF card, USB and 3.5mm audio devices gives you a convenient playing experience - Built-in microphone allows you to answer your calls in a hands-free way - Support FM auto-scan function Specifications: Product Name: Hifi Bluetooth Speaker Bluetooth Version: 5.0+EDR Battery: Built in lithium battery 1400mAH Frequency response: 20Hz-20KHz Charging voltage: USB 5V 500-1000mA Distortion: <1% SNR: ≥80db Speaker: 4Ω 3W AUX: 3.5mm FM Radio: 87-108Mhz Colors: Black,White,Blue,Pink. Product weight: 250g Product size: 139*68*45mm Function: Bluetooth, handsfree phone call, AUX in, TF card/U-disk, FM radio, Temperature displayed in Celsius