EMOS P5750 doorbell kit Red, White

<br />Emos P5750. Product colour: Red, White, Volume: 110 dB, Best uses: Home, Office. Connectivity technology: Wireless, Frequency: 433.92 MHz, Maximum range: 150 m. Power source type: AC, Battery, Input voltage: 230 V, Battery type: Built-in battery. Bell width: 7.2 cm, Bell height: 10.6 cm, Transmitter width: 9 cm