Material: ABS Size: about 52*58mm Package include 1 pc Mini Bluetooth speakers Color: As picture shows Features: LED colorful lights flashing, Bluetooth wireless Play, FM radio, hands-free calls, AUX audio input, U disk, TF card, headphone jack output. Support TF card, U disk up to 16GB Bluetooth version: Bluetooth Bluetooth 2.1 Speaker: new 40mm Power: 4 3W Material: ABS Adjustment method: button Operating voltage: DC3.7V-4.2V Power supply: dual-protection lithium battery (3.7V 400 mA) Play time: medium volume 2-3 hours or so Lightning time: 2 hours Charging voltage: limit voltage DC5V Torque current: DC500-1000MA Signal to noise ratio:> 80DB Distortion rate: <0.5% @ (1KHz) Frequency: 90Hz-20KHz Parameter configuration: Effective distance: 10 meters Output power: 3W Charging voltage: DC 5V Frequency response: 60Hz-20Hz Power supply: with aluminum battery Audio input: Bluetooth, U disk, TF card, AUX Voice prompt: smart English tips Hands-free calls: Bluetooth handsfree calls (optional) Product Features: Colorful flashing Power capacity: 350MAH Notice: Pictures are only samples for reference. Due to limitations in photography and the inevitable differences in monitor settings, the colors shown in the photograph may not correspond 100% to those in the items themselves. Because of manual measurement, it will be slightly different. Please understand.