Features:
1) Construction: water proof
2) Using method :dual use
3) Center freqency :40khz
4) Output sound pressure :min 100db
5) Sensitivity:min -75db
6) Directivity:52
7) Capacitance: 2000?20%pf at 1khz
8) Operating tem range :-30 to 85 degrees celsius
9) Max. Input voltage :120vp-p
10) Detectable range :0.2-4 m
11) Housing material :aluminium
12) Resolution:9mm