Wireless battery powered doorbell solution. Simply place the receiver in the desired location and mount the bell push by your front door. - 58 ringtones to choose from - Volume control - up to 110dB - Eye catching visual alert when doorbell can't be heard - Hassle free installation, no running any wires - Learning code prevents interference from other wireless transmitters - Additional plug in receivers or bell pushes can be added if desired - Working Frequency: 433MHz - Working Temperature: -20 - 50° C Receiver - IP44 rated receiver - Battery powered requires 3 x AAA batteries (not included) - Wall mountable or free standing - Power consumption: less than 0.3W - Range of approx. 150-200m* Bell push - IP55 rated bell push - Includes fixing for mounting - Battery powered requires 1 x 12V 23A battery (included) - Power consumption: less than 10mW - Range of approx. 150-200m* *dependent on environmentTechnical Specification:Depth (mm): 26.2Dimensions: Height: 81mmWeight: 0.12KgWarranty: 1