Features: Temperature control range: 0~70°C / 32~158°F. Programmable time, week, and temperature settings. Three operation modes: manual mode (always ON/OFF), thermostat mode, and thermo-timer mode with up to four programmable settings. 2.4GHz wireless auto-connection technology. Easy-to-read LCD screen with green backlight. 12-hour or 24-hour time format option. Supports both Celsius and Fahrenheit temperature units. Daylight saving time (DST) setting available. Low battery indicator alerts when battery replacement is needed. Current temperature correction and system reset function. Built-in safety protection with relay control, fuse protection, and flame-retardant PC material socket. Specifications: Material: Flame-retardant PC Operating temperature range: 0~70°C / 32~158°F Temperature resolution: ±1°C / ±1°F Transmission frequency: 433.92 MHz Maximum transmission range: 20 meters in open area Power supply: 2 x 1.5V AAA batteries (not included) Low temperature display: ≤0.0°C shows LL High temperature display: ≥70.0°C shows HH Remote thermostat control dimensions: 109 x 60 x 21mm / 4.29 x 2.36 x 0.83in Plug-in socket dimensions: 113 x 66 x 35mm / 4.45 x 2.60 x 1.38in Item weight: 192g / 6.79oz Package weight: 235g / 8.31oz Package dimensions: 12 x 10 x 7cm / 4.72 x 3.94 x 2.76in Package contents: 1 x Remote thermostat control 1 x Plug-in socket 1 x User manual (English)