★ Easy to use: just press a single button to exit most features of these products. Ideal for older and younger. ★ With a simple design, the light of the key lamp 1-12 represents the state of the real zone number 1-12 or 13-24, simple and easy to understand. ★ We always work to simplify your life steps and to make your life easier. This product is thus controlled by a microprocessor with a reduced instruction set. ★ Adjustable light brightness, 4 doorbell zones can be set, 3 groups of emergency call buttons. A device to solve your multi-problems. ★ Low power consumption supports long-term use with an AC indicator that helps you to use these products. In addition, equipped with refractory housing, safer to use., Weight: 0.4188782978 Pounds, Manufacturer: Sonew