12mm 40KHz, Transmitter & receiver High sensitivity, high SPL Good reliability Light weight, wide detective range RoHS Dual use or separate useDiameter: 12.4mm*9.5mmPin length: 7mmFrequency: 40KHz, 33KHzSensitivity:min. -65dBv/ubar/30cm/10VSPL: min.115dB/30cm/10V Ultrasonic sensor 10,12.6,16,18,24mm