Display Output: RGB 1080p@60fps ,MIPI 1080P@60fps , -compatible 4K@30fps Wireless network: onboard 2.4G WIFI+BT module, 2.4G antenna USB connection: one USB Host type-a female and one USB OTG type-c female (on the core board) Audio circuit: on-board 3W speaker driver circuit and electret microphone Storage circuit: the core board has a TF card connector; A WSON8 pad is reserved on the backplane (SPI FLASH is supported) Extended connection: onboard 30P FPC connector (can be connected to our Mic Array R6 microphone array board) GPIO expansion: through 2 x 20P 2.54mm pad leads out GPIO and power supply for users Other functions: one WS2812 RGB LED, one reset button and one user button Overall dimension: 65mm x 40mm Colour:black Material:PCB+ metal Package Contents: 1x for RV Dock expansion board 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.