Radio handheld transmitter, suitable for the PTX001/PRX001 set. Up to 20 PTX001 handheld transmitters can be programmed per receiver at the touch of a button, each handheld transmitter can also be programmed to multiple receivers. Radio frequency 433.92MHz. In key chain format including 12V battery type MN21. Radio range max. 60m (outdoors). Dimensions: 36 x 58 x 13mm.