Low energy consumption and more stable Bluetooth 5.3 for stable connection Bluetooth 5.3 chip, transmission distance up to 10m, low power consumption and stable and smooth signal to achieve true wireless freedom. To perform a concert with series surround sound , turn on the two speakers at the same time. After starting up, take one of the speakers and double-click the power button to perform the interconnection operation. After hearing the prompt tone, the interconnection is successful. At this time, the two speakers Play songs simultaneously. The bass diaphragm is a powerful sound field and the shocking subwoofer is a in a small steel cannon, creating a 360° surround sound effect with equal coverage, so that everyone around you can get the same excellent listening experience. Hands-free calling function for efficient online conferencing. Built-in microphone to enable high-definition hands-free calling with one click for efficient conference calls. Intelligent Compatibility, No Limitations, Intelligent Compatibility with Mobile Phones/Tablets/Computers and other devices. Bluetooth version:V5.3 Bluetooth receiving distance:straight line barrier-free 10 meters Speaker power:3W Battery capacity:300mAh Charging interface:TYPE-C interface Charging time:1.5H Working time: equal 3H at maximum volume (Note: The time vary depending on the type of mobile phone and actual situation) Colour:B:Silver Material:Aluminum alloy + silicone Package Contents: 1 * Speaker 1 * Lanyard 1 * Data Cable 1 * Chinese and English instruction manual 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.