Headphone Accessories -Wireless Bluetooth Car Kit MP3 Music Player FM Transmitter Red USB Charger Highlights Generic Brand Wireless Bluetooth Car Kit MP3 Music Player FM Transmitter Red USB Charger Description: Dual fast charging battery voltage detection USB3.1A. Support Bluetooth music / TF card / U disk play, support Bluetooth hands-free calling. LED screen to show frequency, song number and working status information. Support folder change playback, song classification and playback function. Support power-off memory function. 2 mobile phones are charged at the same time, support while listening to songs and charging. specification: Support extension: U disk / S32G TF card (not included) Power supply: DC 5V Output current: 3.1A Transmission frequency: 87.5MHz - 108.0MHz Protection: short circuit / overvoltage / overcurrent / overpower / under voltage / overheat protection Product size: 86x51.5x45.5 mm Package includes: 1 x Car Handsfree FM Transmitter 1 x User Manual Note: Transition: 1cm=10mm=0.39 inch Please allow slight 0-1cm difference due to manual measurement. Colors may appear differently depending on the light and how the listing is displayed. Thank you for your understanding and attention. I wish you a pleasant shopping experience!