Interface Type: USB Frequency response range: 100HZ-20KHZ Signal to noise ratio: equal 70db Power supply method: External battery Function: Card, remote control, radio, dustproof Mode of operation: Button Display: Yes Support format: TF card Channels: 2 (2.0) Audio Crossover: Full-Range Communication: AUX,USB,Audio Line Support Memory Card: Yes Output Power: 3W Speaker Type: Portable Power Source: AC Material: Plastic Color: As shown Size:86 x 86 x 40mm Due to different product batches, the appearance , which does not affect the use Package Contents: 2 x Type 86 wall speaker 2 x remote control 2 x English manual 2 x Mounting screws Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.