Specifications
1) Center Frequency: 40.0 KHz +- 0.5 Khz
2) Transmitting sound pressure level (dB): e 100(30cm/10Vrms Sine
wave)
3) Receive sensitive (dB): e -74db/v/  bar (0db=V/Pa) -6 db
4) Directivity (deg): horizontal 80o, vertical 50
o
5) Working voltage: 8 - 12V DC
6) Ringing: < 1.5 ms
7) Function: transmitter/receive
8) Capacitance (pF): 2000+-15% at 0.5 KHz
9) Allowable input voltage (Vp-p): 150(40 KHz)
10) Operating temperature: -40 ~ 75oC
11) Storage temperature: -50 ~ 85oC
12) Metal of case: aluminum
13) Terminal: 2 pins (4 pins for flashing)
14) Diameter size: 18-22 mm
15) Weight: 50-150 g
16) Cable: 20 - 700 cm (option)
17) Sealed with waterproof connector: optional