1. Small size, easy to use2. Low voltage, low power consumption3. High accuracy. Strong anti-jamming4. Integrated with wire enclosed waterproof probe, suitable for wet, harsh measurement occasions.5. Application: Horizontal distance; obstacle avoidance, automatic control; the object approaches, there is a perceived; traffic control; security, industrial control; artificial intelligence, and researchElectrical parameters: JSN-SR04TOperating voltage: DC 5VQuiescent current: 5mATotal current work: 30mAAcoustic emission frequency: 40khzFarthest distance: 4.5mBlind: 25cmWiring: + 5V (positive power supply)Trig (control side) RXEcho (the receiver) TXGND (negative)Module size: 41mm x 28.5mmResolution: about 0.5cmAngle: less than 50 degreesWorking temperature: -10 ~ 70 °CStorage temperature: -20 ~ 80 °CThe basic working principle:(1) using IO port TRIG trigger location, to the high level signal of at least 10us;(2) module automatically sends 8 40KHz Fang Bo, automatic detecting whether a signal return;(3) a signal return, a high level is output through the IO port ECHO, the time duration of the high level isultrasonic from launch to return. The test distance = (high level time * speed of sound (340M/S)) /2;This module uses the simple method, a control port with a 10US above high level, can wait for high leveloutput at the receiving port. An output can drive the timer, when this port is low can read the timer value,this time for the location of the time, can be calculated distance. So constantly cycle test, that can achievethe measurement of the value of your mobile.color:BlueMaterial:PCBPackage Contents:3 x JSN-SR04T Ultrasonic Distance Measuring Transducer Sensor WaterproofOnly the above package content, other products are not included.Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.