Theory:

The  Best Mice Repeller works on gopher, vole, shrew and other destructive rodents. works in the garden, Lawn.

It chases away mole and other ground rodents with sound  waves instead of poisons. This repeller emits an intermittent combination of underground sound and vibration every 40 seconds. That mole and other burrowing rodents can't stand. How ever,it won't disturb househole pets.  

The Advanced Solar Powered Mole Repeller has high spec solar panels and an aluminum tube.

The aluminum tube give more durability and makes it easier to insert in the soil.

 More importantly, aluminum is a better conductor of the repelling vibrations.

It with battery case and variable frequency can prevent the immunity of the moles,and also have LED light can brighten your garden.  3 different working models as below:

 First two days, it will sound like “Di” long for 3~5 seconds, interval 50 seconds or so

 Second two days, it will sound like “Di Di Di” in 3~5 seconds, interval 50 seconds or so

 Third two days, it will sound like “Di Di Di Di Di” in 3~5 seconds, interval 50 seconds or so.

 From the seventh day will copy from the first two days and circulate. Work power can insolate one day then continue works 3 cloudy days).

Technical data: 

1.The device had a additional battery cassette, you can replace the battery easily to lengthen product life

2.The device uses computerized inching control technology that is combined with the signal output and DC charge function. The socket (refer to above diagram) is not only the signal output socket, but is also a DC charger. This new technology application gives better, longer life and more effective operation. Variation in sound wave pitch prevents snakes becoming accustomed to the sound waves, making it superior to other snake repellers.

3.Power supply: solar energy , long-life Ni-Cad cell with welded contacts, recharged by solar energy.

4.Frequency: 400HZ-1000HZ

Please note:

1. The top of the pointed bar must be exposed; taking into account variations in the terrain. This is to ensure that water does not extend above the safe line (see illustration).

2. Before first use, please place the solar panel in direct sunlight for two days, before connecting the cable. This ensures the battery is fully charged and effective before connecting the sound wave emitter and inserting the unit into the ground.

Package:

Unit Packing Size:28X15.5X9.5CM                 
QTY/CTN: 10 PCS
N.W.:4KGS
G.W.:5KGS
MEAS:49X29X32.5CM                             
20FT' : 5680 PCS 
40FT' : 11360PCS 
40HQ : 13260PCS