Description: Multiple for Protection: This product supports output overvoltage for protection, short circuit for protection, overcurrent for protection, and overtemperature for protection. Widely Use: This product supports bluetooth-compatible phone, voice, music, navigation. Multiple Music Formats: This product supports multiple music formats such as WMA, MP3, WAV, APE, FLAC. Charging Protocols: This module supports multiple charging protocols. Product Feature: This product comes with real-time monitoring display of voltage and flashing alarm of low voltage. Specification: Color: Black Material: ABS Size: Approx. 12x6x5cm/4.7x2.4x2.0inch Bluetooth Version: Version 5.0 Bluetooth Transmission Distance: Less Than 10m Pd Port Output: 5v/3a, 9v/3a, 12v/2.5a (30w) Usb Port (orange) Output: 5v/3a, 9v/2a, 12v/1.5a (18w) Usb Port (bluetooth) Output: 5v/1a Input Voltage: 12v-24v　　 U Disk/t Card Capacity: Up to 32gb Music Format: Mp3/wma/wav/flac/ape Rated Working Voltage: 12v~24v Limit Working Voltage: 8-32v Working Temperature: 0-60 Degrees Battery Voltage Accuracy: Error ± 1v Signal-to-noise Ratio: >60db Degree of Distortion: <0.1% Frequency Response: 20hz-20khz Left and Right Channel Resolution: 〉60db Bluetooth Microphone Effective Distance: 0.5-2m Effective Transmission Distance: 2m Note: There might be a few color distortions due to different computer resolutions. There might be a slight error due to different hand measurements. Package Includes: 1 Piece FM Transmitter(with 1 Piece Instruction Manual).