Features:* * Made of material, and practical to use * Sensor module board for Arduino laser receiver transmitter non-modulator Tube * Advanced relay module does not work without laser radiation * When the laser is irradiated to the front, the high level relay module works * When the laser is shining from the back, the advanced relay module can also work * KY-008 650nm 5V red laser sensor transmitter diode module dot for Arduino Specification:* PCB Size: 1.52*2.22cm (Approx.) * Operating Voltage: 5V * Light Source Wavelength: 650nm (Approx.) * Output Power: High Output Level When Receiving Laser Signal; Low output when it does not receive the laser signal.*Note: This sensor is not received by the modulator, please test in a room without sunlightPackage Contents:5*Laser Receiver Sensor Modules5*KY-008 Laser Transmitter ModulesNote:1. The actual colors of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness.2. Please allow slight manual measurement deviation for the data.