Length (mm): 27Width (mm): 13.5Height (mm): 14Main Colour: BlueCountry of Manufacture: ChinaMPN: BDAA100209Minimum Operating Temperature: -40°CMaximum Operating Temperature: 85°CNumber of Items: 1Pin Pitch: 2.54mmNoted Circuit Types/Features: Potential dividerVoltage Detection Minimum: 0V DC (5V)0V DC (3.3V)Voltage Detection Maximum : 25V DC (5V)16.5V DC (3.3V)This module is ideally suited to simple voltage reading by an analog pin on a microcontroller. The circuit operates by dividing the voltage across two resistors and measuring it in between them. The module is produces an output at a factor 5:1. The upper limit of the voltage is governed by the maximum input allowed on your microcontrollers analog pin. In the case of a normal Arduino UNO this would be 5V. This would allow a voltage up to 25V to be passed through the divider – producing 5V between the resistors.