Item  |  Value  | 
 Using method  |  Transmitter/Receiver  | 
 Center frequency  | 40±1KHz  | 
 Sound pressure level  | ≥115dB  | 
 Directivity  | 70deg  | 
 Capacitance  |  2000pF±25%  | 
 Operating temperature  |  -20 to +70℃  | 
Receive Sensitive  | ≥-65dB  | 
 Metals of case  |  Aluminum  | 
| コンタクトパーソン : | nick chou | 
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