Optical interface for energy meter reading according to IEC 62056 (IEC 1107). Includes magnet with 5N holding force to attach to the meter. Can be used with a microcontroller with UART interface or a USB to TTL coverter with can be bought as an optional accessory. Communication protocol can be found in the IEC 62056

Input voltage: 3.3V

Dimensions: 32x32x18mm (including the pin header)