Yes, we have various electric fence voltage tester for sale, please see this link: https://levah.cn/category/products/electric-fence/voltage-tester

The neon electric fence voltage testers used to test voltage via 6 neon lights or 8 neon lights. these neon electric fence voltage testers are cheap, easy to use.

The digital electric fence voltage testers are used to test voltage indicate it via LCD screen. the test result is more accuracy.

The fence buzzers are simply used to test if the electric fence are conductive or not.