MODEL:TTD -501. Bluetooth Audio : The new wallet style wireless bluetooth speaker creative gift elegant temperament elegant appearance with a sense of fashion, home or office desktop is not only a decoration but also a unique sound. Bluetooth Speaker Parameters : Wireless standard 5.0, Transmission distance 10 meters, Frequency effect 100Hz~20KHz, Battery lithium ion battery 2200mAh, Simple Operation : Scroll the Round button for Switch on, use dual 5W speaker units to form an acoustic structure, and the sound quality is better. TWS dual wireless series Bluetooth Audio : The front and rear honeycomb round, Wide compatibility : Compatible with most mobile phones, tablet computers, notebooks and other devices with Bluetooth devices on the market, support AUX audio wired input and TF card pre-stored music, plug-and-play breakpoint Fm Radio