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 to fence, it will give a loud beep if the fence is active. Working distance about 20cm near fence. 3. UPDATE . -off button and light. Flash will be useful when in dark or in the . Pocketable design Requires 3 Volt CR2032 button Battery Operation (Not Included) 4. LONG LASTING. Simple design could avoid falling damage. Made from solid materials with a replaceable battery and keyring attachment. Material: plastic colour: black Package Contents: 2 x Electric Fence 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. 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. UPDATE BEEPER. Add on-off button and light. Flash will be useful when in dark places or in the evening. Pocketable design Requires 3 Volt CR2032 button Battery Operation (Not Included) 1. WIDE USE. Match all types of energizers. Can be used on any type of electric fence including steel, wire tape etc. 4. LONG LASTING. Simple compact design could avoid falling damage. Made from solid materials with a replaceable battery and keyring attachment.