The products are widely used in radio modification, cell phones Brush, XBOX360 Brush, GPS, vehicle inspection, DVD Brush, hard disk repair, set-top box upgrades.  Can be used to program the microcontroller type:  STC microcontroller  STM32 MCU  NXP microcontroller  Renesas MCU  NEC MCU  Communications chip: Domestic MAX3232  Operating voltage: 3.3V-5.5V  Interface: TX RX VCC GND  Note: Domestic max3232 chip chip, there are some buyers purchase found no compatibility problems, please confirm before buyers to purchase the chip compatible with your system, to avoid buying the wrong, thank you!