Features: Support bluetooth-compatible connection to play music, you can you can transmit the sound when playing games and watching movies; Support U disk, TF card, digital MP3 player,no need to switch, automatically read audio files and play after inserting TF card/U disk; Built-in rechargeable lithium battery, can be used after charging; Adopt enhanced digital power amplifier IC, low power consumption, high power, strong, loud and clear sound Multi-button control: volume, mode, etc. can be adjusted individually Specifications: Colors: Black/Red/Blue/Camouflage/Yellow-blue/Triangle blue/Red and blue Charging voltage: 300-500mAh Box material: Plastic + Cloth Mesh Amplification frequency: 100HZ-20KHZ Speaker power: below 10W Battery: Built-in battery (rechargeable) 300mAh Product size:approx 9.2x9.2x4.8CM/3.62x3.62x1.89in Control method: Bluetooth-compatible Package Includes: 1PC x Speaker 1PC x Charging Cable note: Please allow 0-1cm error due to manual measurement. please 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!