When used with the Robo:Bit buggy the Ultrasonic Distance Sensor lets the robot detect objects before it collides with them allowing you to program it to avoid them. It can also be used to create a 'follow me' program where the robot tries to stay a certain distance from the object in front of it.\n\n--Extends the versatility of the Robo:Bit buggy\n\n--Ready assembled, just attach to Robo:Bit using supplied screws\n\n--Ping and echo signals on same pin (pin 13)\n\n--Operating voltage 3 to 5V DC\n\n--Range 2 to 450cm\n\n--Resolution 0.3cm\n\n--Sensor angle 15\u00B0\n\n--4-pin Header with 2.54mm pitch\n\n--\nOur eBay Store\n\n4tronix HC-SR04 Ultrasonic Distance Sensor V2\n\nProduct Details\n\nWhen used with the Robo:Bit buggy the Ultrasonic Distance Sensor lets the robot detect objects before it collides with them allowing you to program it to avoid them. It can also be used to create a 'follow me' program where the robot tries to stay a certain distance from the object in front of it.;