| 
 Impedance    | 
 25/50/75/100/ohm  | 
| 
 Impedance Resolution  | 
 5%  | 
| 
 Distance  | |
| 
 Measurement Range  | 
 15m-2000m  | 
| 
 Resolution  | 
 1m  | 
| 
 Accuracy    | 
 1m  | 
| 
 Others  | |
| 
 Dimension  | 
 190mm×80mm×152mm  | 
| 
 Weight  | 
 600g  | 
| 
 Working temperature  | 
 -10℃~+50℃  | 
| 
 Storage temperature  | 
 -20℃~+70℃  | 
| 
 Display  | 
 128×128LCD(With back light power source)  | 
| 
 Battery  | 
 7.2V 1.8AH Ni-MH batteries  | 
| 
 Charger  | 
 AC  90V~240V 50/60Hz DC 9V-0.7A  | 
| 
 Working time  | 
 average 7~8 hours(Full charge)  | 
| 
 Charge time  | 
 More than 12 hours  |