Roule&reg; RL-3980 Energy Saving Wireless Remote Doorbell Door Chime, Electronic Digital Door Bell, 330 Feet Range, Ip44 Waterproof and Dustproof Standards Wireless working range up to 330 feet, patent low energy consumption technology. for remote will last more than 2 years. Receiver chime is operated by 3 AAA batteries, will last more than 1 years, 16 different chimes. Remote control meets IP44 waterproof and dustproof standards, battery included, which will last more than 2 years. Advanced learning code technology and digital transmission signal to prevent interference. Easy setup, no cable or wire required.