Metal panel brushing Built-in Bluetooth + Microphone Support hands-free calls. Support advanced audio streaming mode. Support clock indication while power is off. High quality digital stereo FM radio FM: Support three-band radio store FM1-FM2-FM3 and can preset 18 radio stations. (Radio Frequency: 87.5-108MHz) Support USB/TF card reader. Audio Support: MP3/WMA/WAV Formats, etc. Support folder play function Support memory breakpoint and ID3 play remote control support Rotary electronic volume control MP3 play supports pause/preview, repeat/random play and 10 tracks/down selections. Electronic type double bass / treble / left and right balance / front and rear balance volume control Multiple EQ stage mode option: rock, pop, classic, etc. Supports mute and same intensity control (LUOD). Front auxiliary audio input hole and rear terminal L/R audio RCA output hole. 4 track high power output (4 high power speakers) 60W*4 Working voltage: DC12V-14.4V Includes the installation size of metal frames (mm): 182 (width) * 52 (height) Body size: 178mm (width) * 50mm (height) * 68mm (D) Shape Size: 188mm*58mm(H) kindly attention: This car radio is not built-in and includes any memory card or TF card inside. There is no CD space for the CD player. This is not compatible with CD/DVD player. This is car radio MP3 player USB TF card Included: 1 * car MP3 player 1 * remote controller (without battery) 1 * power cord 2 * install key 1 * English User Manual