Reddit reviews Non-programmable Thermostat, Heat Pump Thermostat 24 Volt With Backlit Digital Display For Room, 2H/1C,Saswell T21HTW-0

This is a 24VAC low-voltage non-programmable thermostat for room use, compatible with heat pump (with aux) systems,compressor short cycling protection.【IMPORTANT】 Currently does not support millivolt systems2 Heat/1 Cool Conventional and Heat Pump,Accurate temperature control of +/-1-Degree F for consistent comfort,Air Filter change reminder and Low Battery Indicator available.Large LCD display with backlight,easy to read in various lighting conditions,OPTIONAL 2 “AAA” Batteries provide continuous temperature display during power loss.Detailed instructions for easy installation,C-wire needed for proper installation.B and O terminals available.Note-c wire is required and is the primary power source for your thermostat. Without a c wire, your thermostat will not power up, In the case of battery power, there is no need to connect the C wireMake comfortable temperatures to reduce energy usage,savings on annual heating and cooling costs.