1. WIDE USE. Match all types of energizers. Can be used on any type of electric fence including steel, wire tape etc. 2. . Do not need to touch fence wire. Just PRESS BUTTON and hold it close to fence, it will give a loud beep if the fence is active. Working distance about 20cm near fence. 3. MORE CONVENIENT. Pocketable design add on-off button. Avoid to beep when unnecessary. Requires 3 Volt CR2032 button Battery Operation (Not Included) 4. LONG LASTING. Simple compact design could avoid falling damage. Made from solid materials with a replaceable battery and keyring attachment. Lydite Fence Beeper works with fence hold beeper close to an electric fence and press buttom it will give a loud beep if the fence is active 1,Portable and easy to use 2,Working distance 1-2meter near fence warning! do not touch the fence line Requires 3 Volt 2032 button Battery Operation (Not Included) If no alarm, the cause may of the following: A. The wire has no voltage B. The beeper has electrical problems C. The battery has no electric Colour:black Material:plastic Package Contents: 1 x Fence Tester Only the above package content, other products are not included. Note: Light 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. Note: Please allow slight errors due to manual measurement. Please make sure you don't mind before bidding. Color may vary depending on your monitor, please understand. Note: Hello, please pay attention to your shipping address when purchasing products. If your delivery information (e.g. name, street, house number, doorbell/email without name, etc.) is incorrect, the order will not be delivered correctly