The Uni-Com Portable Door Chime can be used wall-mounted or free-standing around your home and garden. Supplied with a weather-resistant kinetic bell push that requires no battery and comes already paired to the chime unit, so is ready to use straight out of the box. It has an extensive wireless range of up to 100m, this means the chime unit can be carried from room to room and outside into the garden to ensure a visitor is never missed. The chime unit can be programmed to one of 26 enhanced chimes that include the Westminster chime, traditional Ding Dong, Happy Birthday and even Jingle Bells for use during the festive period. There are 4 volume settings and 3 operating modes: chime sound only, flashing light only and both together. The light only option is ideal for when children or shift workers are sleeping. All Uni-Com door chimes work together and can be mixed and matched throughout your home. Chime Unit powered by 3 x AA batteries (not supplied). Specification: Sound Output: 85 dBA Frequency: 433.92 MHz Chime Unit Dimensions (HxWxD): 82 x 82 x 35mm Bell Push Unit Dimensions (HxWxD): 35 x 86 x 34mm Compliant with Directive 2014/53/EU (RED).