General description This wireless doorbell offers a long-range transmission of up to 300 meters (1000 feet) in open areas, ensuring you never miss a visitor whether you're in the kitchen or the garden. With 36 CD-quality melodies and adjustable volume levels, it caters to various environments and preferences. The doorbell also features a flashing light indicator, making it accessible for the hearing impaired, and is designed to withstand harsh weather conditions. Technical specifications Size: 11.7 x 9 x 8.4 cm Weight: 220 grams Receiver input: 110V to 240V, 50/60Hz Volume adjusting: 4 stages (0-85dB) Transmitter input: 12V 23A alkaline battery Working frequency: 433.92MHz Wireless range: 300 meters Battery life: 3 years Compatibility and accessories Includes: 1 Transmitter, 1 12V battery, 2 Receivers, 1 3M tape, 1 Manual, 1 Screwdriver