The Hive Smart Heating Thermostatic Radiator Valve (TRV) with Smartphone Compatibility is a white, smartphone-compatible product designed for central heating systems. The package includes valve adaptors (M30, Danfoss RA), 2 AA batteries, and a smart thermo component. This TRV radiator valve, manufactured by Hive, is a convenient addition to any home heating and cooling system, allowing users to easily adjust and control temperatures using their smartphones. With a compact size of 22.86 x 12.7 x 5 cm and a weight of 134 grams, this product is a must-have for those looking to modernize their heating system.