Features:This product has remote control function, convenient to use. It is only applicable to draught fan and air conditioner motor of 380VAC(single-phase input, 3-phase output).0-50Hz frequency control, it supports stepless speed regulation of draught fan motors, draught fans have air blowing-in and blowing-out function.Specification:Name: Variable-frequence speed controller for draught fans, air conditioners, motorsModel: JFD Application: Draught fans, air conditioners, motorsPower supply phase number: Single phaseShell material: Flame-retardant plasticRemote control battery type: Two AAA batteries (NOT included)Size: 160 * 120 * 95mm / 6.3 * 4.7 * 3.7inInstallation method: Wall-mountedInstallation site: Indoor (less than 1 km altitude, no dust, no corrosive gas and no direct sunlight).Applicable environment: -10 ~ +40--20% ~ 90% RH (no condensation)Vibration: Less than 0.5gProtection grade: IP20Cooling mode: Forced air coolingPackage list:1 * Controller1 * Remote1 * User Manual