General description The 3X Sensor Motion Door Bell Switch is an innovative MP3 infrared doorbell designed to enhance your home security and convenience. Featuring a wireless PIR motion sensor, this doorbell plays a welcoming audio message when someone approaches, ensuring you never miss a visitor. Technical specifications Model: Microsound V22.12 Product Type: MP3 Infrared Doorbell Audio Format: MP3 (Bit Rate: 8 ~ 320Kbps) Built-in Speaker: 8ohm 1W Speaker Sensor: Infrared Induction Power Supply Mode: DC3V ~ 5V Stabilized Voltage Supply Working Current: ≤100uA (Sleep Standby Mode); ≤130mA (DC 4.7V) (Playing Mode) Infrared Induction Distance: ≤ 4 meters (45° Angle) Sample Rate: 14KHz Memory Size: Built-in 4Mbit SPI FLASH memory Humidity: 10 ~ 85% RH Colour: White Material: ABS Size: 90 x 60 x 26.6 mm Installation Can be ceiling mounted or wall mounted Power supply options: External USB power supply DC 5V or 3 AAA dry batteries (Not Included) Usage Ideal for home entry points to welcome