[INCLUDES SIX ADAPTERS FOR COMPATIBILITY] This smart radiator thermostat is designed to fit most radiator valves with a M30 x 5 mm thread size, complete with six adapters for maximum compatibility across diverse heating systems. [FEATURE-RICH TEMPERATURE MANAGEMENT] Boasting programmable settings, window open detection, historical temperature queries, and frost protection, this thermostat offers comprehensive control over your home's temperature settings. [EFFICIENT BATTERY USAGE FOR LONGER LIFE] Requires three 5-volt alkaline AA batteries (not included), designed to last up to 10 months due to its energy-efficient technology. [SAFETY AND MULTI-DEVICE MANAGEMENT] Features like child lock and group control allow for safe operation while providing the ability to manage multiple devices seamlessly for optimal comfort.