Product features: 1: is beautifully designed and its appearance is simple and generous. PC material panel and acrylic screen film are not easy to crack. 2: uses a dot matrix screen to indicate state of work 3: anti power supply reverse design, even if power reverse connection not burn products, AC and DC dual purpose. 4: real stereo output Bluetooth is based on CLASS 2 power level, and adopts Bluetooth 2.1+ specification. It is compatible with version 3 and below, and transmission distance is more than 10 meters. Specification parameters: Power supply type: AC and DC dual purpose External interface mode: USB, SD Output amplitude: "600MV Rated input: 12V/1A Rated power consumption: USB playback current "120MA" Other states "80MA" Use temperature: -20 ℃ ~ 60 ℃ Standard configuration: 1PCS ultra thin 21 key ultra thin remote control Application scope:It is applied to family combination sound, car audio and computer multimedia audio, professional active sound, sound, AV power amplifier, massage chair, electronic gift, electronic toy and so on, suitable for sound box (sound) DIY enthusiast. Color: As Shown Material: plastic Package Contents: 1 x speaker 1 x remote control Only above package content, other products are not included. Note: Light reflection and different displays may cause color of item in picture a little different from real thing. The measurement allowed error is +/- 1-3cm.