About this item TWS surround Sound Technology: The Bluetooth speaker features new TWS stereo technology that allows you to pair two speakers and connect them to your phone simultaneously for truly enhanced 360° surround sound. Compatible USB, TF card, AUX cable and built-in noise reduction microphone make calls clearer. TF/AUX 3.5mm/U disk function - Speaker support TF playback. The 3.5mm AUX input allows connections to devices that do not support Bluetooth, such as PC. You can plug a USB flash drive into the speaker to listen to music. 10 hours of battery life: This Bluetooth speaker can be charged for 10 hours of battery life.Built-in lithium-ion battery for 8 hours of music and talk (depending on volume). Maximum sound level: 80 dB Large moving coil speaker, high, medium and low audio types, sound layer restoration, stereo surround sound.57mm horn with bass vibrating film.Cute and stylish eggshell shape. Bluetooth and hands-free phone functionality -- Bluetooth connects smartphones or tablets up to 10 metres away; Built-in microphone for hands-free phone calls.Bluetooth 5.0 、AUX/USB Port、TF Card four play modes.