Specifications: Power supply voltage VCC: 3.2~5.25V; Pull-up current (@ high = 5V): 1.3mA; High Input: 3~VCC + 0.3V; Low-level input: -0.3~+0.7V; IR emission distance: 10m; Interface Description: Control Interface: Total of three pins (GND VCC SIG) GND to ground VCC is the power supply SIG is the signal input pin. Infrared emission: emission wavelength of 940nm can be infrared signal. Groove: easy adjustment infrared emission direction manually. Positioning holes: 4 x M2 screws positioning hole diameter is 2.2mm the positioning of the module is easy to install to achieve inter-module combination; A product for Arduino that works with official Arduino boards.