Non-Programmable Thermostat for House, Digital Energy-Saving Home Thermostats, up to 1 Heat/1 Cool Single-Stage Systems Green Backlight

【Precise Fit for Single-Stage Systems】Designed exclusively for home single-stage heating (gas/oil/electric furnaces), ventilation, and air conditioning systems, supporting 1 Heat/1 Cool configurations; Only compatible with existing bases with 2 to 5 wires, please check the number of wires in advance to ensure compatibility

【Clearly Incompatible Systems】Not suitable for multistage systems (1H/2C, 2H/2C), HVAC heat pump systems, PTAC units, 3-wire hydronic (hot water) heating systems, dual fuel/hybrid heating systems; Does not support 120-240V line voltage systems, mini-split heat pump air conditioners, RV air conditioners (Mach/Roughneck series)

【Dual Power Supply, No C-Wire Needed】Supports 24VAC hardwiring or 2 AAA batteries power supply; No common wire (C-wire) required for most standard systems, making retrofits in older homes more convenient

【Clear & Easy-to-Read Design】Equipped with a large green backlit display with clear, prominent numbers, especially suitable for the elderly to view; Room temperature display range: 41°F to 95°F, Temperature control range: 44°F to 90°F

【Precise Temperature Control & Protection】±1°F temperature control accuracy ensures a comfortable experience, supporting °F to 2°F heat/cool swing adjustment; 5-minute compressor delay protection (selectable ON/OFF) with low battery indicator function

【Reliable After-Sales SATISFACTION GUARANTEE】Enjoy a 2- satisfaction, and 24/7 professional customer service team is ready to provide support for installation, wiring, and troubleshooting at any time; It is recommended to check the wiring port layout of your old thermostat before purchase to ensure a seamless