Description: Working Voltage: 5V(DC) Input trigger signal: 10us TTL impulse Echo signal: output TTL PWL signal Output signal: Electric frequency signal, high level 5V, low level 0V.0V. Module Working Principle: 1. Adopt IO trigger through supplying at least 10us sequence of high level signal. 2. The module automatically send eight 40KHz square wave and automatically detect whether receive the returning pulse signal. 3. If there is signals returning, through outputting high level and the time of high level continuing is the time of that from the ultrasonic transmitting to receiving. Test distance = (high level time * sound velocity (340M/S) / 2 Specification: Material: ABS+FR4 epoxy glass fiberboard Size: 5.1 x 4.6 x 4.5 cm / 2 x 1.8 x 0.18inch No-load operation speed: 0.12s/60 degree (4.8V); 0.10s/60 degree (6.0V) Stall Torque (4.8V): 1.6Kg x cm Operating temperature: -30~+60 °C Dead zone setting: 5microsecond Working voltage: 3.5~6V Static current: Less than 2mA. Sensor angle: Not more than 15 degrees. Detection distance: 2cm-450cm. High precision: Up to 0.3cm Servo Weight: 9g Package Includes: 1 Piece Ultrasonic Distance Measuring Transducer 1 Piece 9g Servo 1 Piece Servo Holder