Practical and stylish The OneBell 100 Light is equipped with a double sound and light signal, ideal for noisy places or people with hearing impairments. Thanks to its 100% autonomous operation, it is also very ecological Long distance transmission. The wireless doorbell signal covers a distance of 100 m. Even if you are in other rooms or floors, you can hear the sound, but the sound does not affect your neighbors. Suitable for most homes and offices. You'll never miss your visitors with this wireless doorbell kit Features: The doorbell button is powered by a CR2032 3V battery — The ABS chimes — Frequency 433.92 MHz — Maximum transmission power <20 mW — Power supply: 3 LR06 AA batteries with 1.5 V not included — Indoor use — 15 built-in melodies International products have separate terms, are sold from abroad and may differ from local products, including fit, age ratings, and language of product, labeling or instructions., Weight: 0.4188782978 pounds, Manufacturer: SCS Sentinel