BOSCH, Radion Series, Wireless detector, TriTech, 10.7 x 10.7m coverage, 2m mount height, Pet immune up to 45kg, Integrated RF transmitter, Suits RFRC-STR2, RF3212E, B810 & RF120 receivers, 433MHz

11 m x 11 m (35 ft x 35 ft) coverage. Pet Immunity up to 45 kg (100 lb). Includes battery life extension feature. Draft and Insect immune. Supervised for low-battery, cover-tamper, and removal from mounting surface tamper conditions. 4x AA Alkaline