1. It is widely used in radio modification,phone flash,XBOX360 flash,GPS,vehicle detection, DVD flash,hard disk repair set-top box upgrade. 2. It can be used to program STC MCU,NXP MCU,Renesas MCU,STM32 MCU,N+-2EC MCU 3. Communication chip:domestic MAX3232 4. Working voltage:3.3V-5.5V What's in the package: - 1PCS* RS232 to TTL Converter Module Serial Module - 4PCS DuPont Wires