The Honeywell Motion Detector functions as a completely wireless and security add-on. The compatibility range is as follows: RCWL300A, RCWL330A, RPWL400W + RPWL401B (accessory converter not required), Series 3, 5, 9 and all other Honeywell Decor Series Wireless Chimes. For additional security purposes and an elevated peace of mind, the RCA902N will alert you whenever someone approaches your home. This motion detector is also fully capable of monitoring movement within specific rooms in your home. An abundance of creative options and a sensing range of 40 ft. make the RCA902N an excellent selection for home and small business owners alike. The normal detection range can be extended with the purchase of the RPWL3045 converter.