The OneNav Pro ON820-1A is a 9 inch aftermarket infotainment head unit designed for Mercedes A-Class, B-Class, Vito and Viano. It retains original radio functions including steering wheel controls, parking sensor display and air conditioning display when integrated with the vehicle.

Hardware includes a Rockchip RK-PX6 CPU (dual-core Cortex-A72 up to 1.8GHz and quad-core Cortex-A53 up to 1.4GHz), Mali-T864 GPU, 4GB RAM and optional 64GB flash. The 9 inch 16:9 1280×720 capacitive touchscreen supports 5-point touch. Connectivity and media features include NXP6686 radio with RDS, Ublox6M GPS, TDA7560 4x50W amplifier, 3 USB ports, WiFi RTL8188CTV, CSR Bluetooth with contact copy and A2P playback, 15-band DSP, 5.1 RCA outputs and support for optional TPMS, reverse camera, OBD and digital video recorder modules. Unit is CE and RoHS compliant and rated for operation between -20 and 70 C.