Long Range Wireless Doorbell w/. Professional Door Chime. Loud Adjustable Volume. LONG RANGE up to 1,000 ft from the push button to the wireless receiver. (range will be affected by walls, trees, etc.) SUPER EASY installation. Quick Start Guide has you operational in minutes. LOUD adjustable volume control. Over 30 ring tones. Different tones can be assigned to different push buttons. Unlimited number of extra push buttons and receiver chimes can be added. LIFETIME manufacturer's warranty.