Features 1、AC VOLTAGE REGULATOR: This module is used for regulating AC voltage, with high power of 1000W, practical and effective. 2、MULTI FUNCTION: This AC voltage regulation board is multifunctional, which can be used to control serial port dimming, speed and temperature. 3、MANUAL CONTROL: The module is designed with button, you can control the output voltage plus or minus manually through the button. 4、ADJUST METHOD: This module controls the load stepless voltage regulation by adjusting 0 to 5V signal voltage. 5、SUPPORT PROTOCOL COMMUNICATION: The module supports standard serial port protocol communication, add more convenience. Specification Item Type: Voltage Regulation Module Material: ABS Color: White Voltage: 220V Purpose: Serial port dimming, speed, temperature control Package List 1 x Voltage Regulation Module