Features: and high qualityBuilt-in 2200mAh large rechargeable battery can provide long-lasting power for entertainment for time, avoid frequent charging, and eliminate the trouble of insufficient battery power.Built-in upgraded version of bluetooth-compatible module, fully support mobile phone/pad and the other digital products with bluetooth-compatible.for most brand mobile phone,computers.It could be used with most singing APP in the market.The sound card supports multiple scene modes and multiple sound effects. It can become the voice of children, men, women, etc., and add fun to the sound.Universal standard 3.5mm plug for stable o signal input and output. Specifications:Material:MetalSize:25x15cm/9.84x5.91inColor:Black;Battery Capacity:2200mAho Interface:3.5mm PortCharging:5V/1AChannel System:Dual Channel Note:Please allow 0-2cm error due to manual measurement. pls make sure you do not mind before you bid.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you Package includes:1x Sound Card1x Charging Cable1x o Cable1x Manual