Brand N/A Model RCW-0002 Quantity 1 Color Green + silver Material PCB Features Using IO trigger ranging high signal to at least 10us; Module automatically sends eight 40khz square wave automatically detects whether a signal return; A signal back through the IO outputs a high level; Ultrasonic time from launch to return. Test distance = (High level time x sound speed (340M / S)) / 2 Specification Working voltage range: 3V~5.5V; Working current: Less than 3mA; Induction angles is adjustable (The greater the R3 resistance the higher the gain the greater the detection angle); R3 impedance is 392ohm Application Great for DIY project English Manual/Spec Yes Packing List 1 x Ultrasonic ranging module