Specifications: - Working Voltage : 5V(DC) - Static current: Less than 2mA. - Output signal: Electric frequency signal, high level 5V, low level 0V. - Sensor angle: Not more than 15 degrees. - Detection distance: 2cm-450cm. - High precision: Up to 0.3cm - Input trigger signal: 10us TTL impulse - Echo signal : output TTL PWL signal Package Content: - 1 x HC-SR04 Ultrasonic Sensor Module