Honeywell P2-Portable Wireless Door Chime & Push Button Plastic 16.51 centimeters high 9.14 centimeters wide Wireless - Battery operated Works with up to four (4) door bell push buttons Flashing light indicator or four (4) chime tunes with three (3) volume levels Self learning code system automatically adjusts to eliminate interference 150-ft operating range What's Covered: mechanical and electrical failures during normal use, 100% parts and labor Get fast repairs or replacements from SquareTrade, an Allstate company 24/7 customer support, free shipping for all repairs, no deductibles or hidden fees Cancel anytime, full refund in first 30 days, fully transferable with gifts SquareTrade Protection Plans are only valid for new or Amazon certified refurbished products purchased at Amazon in the last 30 days. By purchasing this Protection Plan you agree to the Protection Plan Terms & Conditions (http://www.squaretrade.com/terms-standard). Your Protection Plan Terms & Conditions will be delivered via email within 24 hours of purchase