General description The 6X Sensor Motion Door Bell Switch is a wireless MP3 infrared doorbell that features a PIR motion sensor and a voice prompter for welcoming guests. It is designed for easy installation and offers excellent sound quality with customizable volume levels. 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 Ceiling mounted or wall mounted Power supply: External USB power supply DC 5V or 3 AAA dry batteries (Not Included) Usage Ideal for entryways to welcome guests with a voice prompt Operates