Name: WaterPipe Leak Detector Model: F999R Current consumption: 13-33 mA Probe sensitivity: -60db Four-Level audio selection: 3-Level (100Hz-700Hz); 2-Level (700Hz-900Hz); 1-Level (900Hz-1100Hz); 0-Level (1100Hz-1600Hz) Maximum audio amplification: 25000 times Operating time: 10-23 hours (according to the strength of the sound to determine) Power supply: 9V 6F22 Battery (Not included) Applications: It can be used for pipeline side leakage/floor heating detection/wall leakage/automobile noise detection,and it is applicable to various pipeline materials and floors, walls, etc Color: Black Material: Metal Package Contents: 1 x Host 1 x Probe 1 x Earphone Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.