KIT CONTENT:1X Laser Sensor Module,1X Ultrasonic Sensor,120 Pieces Jumper Wires the laser transmitting module emits a small intense beam of wavelength (? ) 650Nm (colour: red on visible spectrum). It can be used in various applications like laser obstacle, laser guitar, home-made laser tag, etc. The module is compatible with various contemporary microcontrollers including Arduino, raspberry pi, etc. It is available with a fixed screw hole for easy deployment. Specifications: supply voltage: 5v dc. Output wavelength: 650 nm. number Of pins: 3 (gnd, vcc, i/p). Dimensions (lbh in mm): 20 x 5 x 13. Package include: 1 x 650nm laser diode pcb / module Ultrasonic ranging module HC - SR04 provides 2cm - 400cm non-contact measurement function, the ranging accuracy can reach to 3mm. The modules includes ultrasonic transmitters, receiver and control circuit The item is a set of 120 pieces 20cm 40 pin jumper wires and are made of high-grade copper wire material for safe and durable to use.