1.2 function 1, supports sampling rates (KHz): 8 / 11.025 / 12/16 / 22.05 / 24/32 / 44.1 / 48 2,24-bit DAC output, dynamic range support 90dB, SNR support 85dB 3, full support for FAT16 , FAT32 file system, maximum support 32G TF card, support U disk to 32G, 64M bytes of NORFLASH 4, a variety of control modes are available. IO control, serial port, AD key control mode 5, the broadcast language spots feature, you can pause the background music being played. Advertising finished playing back background sound continues to play 6, the audio data sorted by folder, supports up to 100 folders, folders can assign every 255 tracks 7,30 level adjustable volume, Level 6 EQ adjustable 13,416,333,143 1.3 Applications 1, 2 car navigation voice broadcast, road transport inspectors, toll voice prompts; 3, the train station, bus station security check voice prompts; 4, electric power, telecommunications, financial operating room voice prompts; 5, vehicle entrance, the tunnel authentication voice prompts; 6, public security frontier passage voice prompts; 7, multi-channel voice alarm or voice guidance equipment operation; 8, electric sightseeing bus safety with voice announcement; 9, electrical and mechanical equipment failure alarm; 10, fire alarm voice; 11 automatic broadcast equipment, regular broadcast