This wireless speaker uses large-capacity battery, which features long standby time. It has built-in FM radio, which is multifunctional. Adopting Bluetooth-compatible5.0 chip and noise-reduction microphone, this wireless speaker supports stereo and surround sound effect as well as HD-compatible calling experience. It is constructed of ABS material. The length of this wireless speaker is 13cm, width is 6.7cm and thickness is 3.2cm. This wireless speaker is suitable for calling, driving, listening to music, office and so on. Item Name: Wireless Speaker Material: ABS Model: E500 Bluetooth-compatible Version: 5.0 Separation: 80dB Distortion: 1% (3.7V, 1KHz, 1W) Signal-to-noise Ratio: 83dB Working Voltage: DC3.7V Charging Voltage: DC5.0V Battery Capacity: 1500mAh(Built-in) Impedance: 4ohm Display: LED Display Speaker: 2 x 1.5 Inch+1 x Passive Radiator Audio Format: MP3/WMA/WAV Features: High Fidelity, Subwoofer, LED Digital Display Size Details: 13cm x 6.7cm x 3.2cm/5.12" x 2.64" x 1.26" (Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x Wireless Speaker 1 x USB Cable 1 x User Manual