✅ 【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 multi-stage HVAC systems (2H/2C, 3H/2C), HVAC heat pumps systems(2H/1C, 2H/2C), 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 white 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 0.2°F to 2°F heat/cool swing adjustment; 5-minute compressor delay protection (selectable ON/OFF) with low battery indicator function

⚠️ Pre-Purchase Verification (Critical for Renovations) – Before ordering, confirm your HVAC system is a 1H/1C single-stage setup (non-heat pump). Review all wiring diagrams and installation guidelines. Purchase only if your system meets all requirements to avoid compatibility issues.

✅ 【Reliable After-Sales Guarantee】Enjoy a 2-year worry-free warranty, and 24/7 professional customer service team is ready to provide support for installation, wiring, and troubleshooting at any time.