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 LED display screen let you know the working status of the speaker 2200mAh rechargeable lithium-ion battery supplies longer playing time Very easy to set up and use, your Bluetooth is ready, your music is ready 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 Bluetooth Version: 5.0+ Battery: Built in lithium battery 2000mAh-4000mAh Frequency response: 100HZ-20KHZ Charging voltage: USB 5V 500-1000mA Distortion:Less than 1% SNR: equal 70db Speaker: Φ40mm 4Ω 3W AUX: 3.5mm FM Radio: 87-108Mhz Colors: Black Function: Bluetooth, handsfree phone call, AUX in, TF card/U-disk, FM radio Compatible: Support for /for /for /for Smartphone, for PC computer etc. Color:Black Material:Metal Package Contents: 1 * Bluetooth speaker 1 * Charging cable Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.