The Honeywell Premium Portable Wireless Door Chime and the SadoTech Model CXR are highly rated wireless doorbell systems, with 4.5 out of 5 star ratings on Amazon.com, as of May 2015. Both doorbell systems offer multiple chime tones and adjustable doorbell volumes.
The Honeywell Premium runs on battery power and features a 450-foot operating range. The portable wireless design allows homeowners to bring the device anywhere within range and still hear the doorbell ring. The device also offers motion-sensing technology for use as an alarm on chosen doors or windows.
The SadoTech Model CXR features a 1,000-foot wireless range. The device contains two transmitters that sound when the doorbell rings, which can be placed in any location within range of the device.