1. Small size, easy to use 2. Low voltage, low power consumption 3. High accuracy. Strong anti-jamming 4. 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 research Electrical parameters: JSN-SR04T Operating voltage: DC 5V Quiescent current: 5mA Total current work: 30mA Acoustic emission frequency: 40khz Farthest distance: 4.5m Blind: 25cm Wiring: + 5V (positive power supply) Trig (control side) RX (the receiver) TX GND (negative) Module size: 41mm x 28.5mm Resolution: about 0.5cm Angle: less than 50 degrees Working temperature: -10 ~ 70 °C Storage temperature: -20 ~ 80 °C The 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 , the time duration of the high level is ultrasonic from launch to return. The test distance = (high level time * speed of sound (340M/S)) /2; color:Blue Material:PCB Package Contents: 3 Set x JSN-SR04T Ultrasonic Distance Measuring Transducer Sensor Waterproof Only the above package content, other products are not included. Note: Light reflection 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.