The decoder board supports the connection to various storage cards like MMC, SD, MMA and USB flash disk. In addition, it also supports many music formats like MP3, WMA and WAV. The functions of Calling, recording, music-playing, FM radio and power-off memory are supported by this multifunctional decoder board. With the remote controller, it is convenient to use. Made of ABS material, the decoder board is lightweight and durable to use. The length of the decoder board is 85mm, width is 32mm.and height is 33mm. The decoder board is suitable for calling and playing music in car. Item Name: Decoder Board Material: ABS Color: Black Frequency Range: 87.5MHZ-108.0MHZ Bluetooth Version: V5.0 Keys Quantity: VOL-/AUTO/VOL+/MODE Remote Control Distance: 5-10m Support Format: for MP3/WMA/WAV Non-volatile Memory: 24C02 Size Details: 8.5cm x 3.2cm x 3.3cm/3.35" x 1.26" x 1.3" (Approx.) Notes: Please note that the product is a decoder board, not including the remote controller. Due to the light and the screen setting difference, the item's color may slightly differs from the pictures. Button Instructions: 1: VOL- button (previous song/volume down): in MP3 mode, the short-time press of the VOL- button can switch to the previous song while the long-time press can decrease the volume; in FM mode, the short-time press can switch to the last FM band; in bluetooth-compatible mode, the short-time press is the previous bluetooth-compatible song while the long-time press can decrease the volume. 2: AUTO button (play/pause): in MP3 mode, the short-time press of the AUTO button is to play or pause; in FM mode, the short-time press is to play or pause while the long-time press is to automatically save the current FM band; in MP3 mode, the short-time press is to play or pause. 3: VOL+ button (next song/volume increase): in MP3 mode, the short-time press of the VOL+ button can switch to the next song while the long-time press can increase the volume; in FM mode, the short-time press can switch to the next FM band; in bluetooth-compatible mode, the short-time press is the next bluetooth-compatible song while the long-time press can increase the volume. 4: MODE button: the press of the MODE button can switch among the functions of USB, SD, FM, AUX and Bluetooth. Package Includes: 1 x Decoder Board(Remote Controller Not Concluded)