Ultrasonic Sensor, Distance Measuring ModuleProduct Details:Arduino CompatibleWorking Voltage: 5 Volt DCStatic Current: Less than 2 mASensor Angle: Not More Than 15 Degrees.Detection Distance: 2cm – 450cm.High Precision: Up To 0.3cmInput Trigger Signal: 10us TTL ImpulseEcho Signal : Output TTL PWL SignalConnection Mode: VCC, trig (control end), echo (receiver end), GND Overall Size: 1.77 x 0.78 InchUNKHC-SR04