Zilla Basic Tropical Starter Kit Size 10 dog remote trainer Quickly synchronize the transmitter with Quickly synchronize the transmitter with collar receiver REVOLUTIONARY Patented compact wifi radio transmitter (NOT RECHARGEABLE) and receiver collar (RECHARGEABLE) our product comes with an anti over shocking design that will only shock your dog for a defined time "54 SECONDS MAX" when he is outside the boundary zone or when he is not receiving any signal (behind trees Essentials like a temperature humidity gauge are included to monitor the environment and keep your companion living comfortably An excellent all in one starter kit for a fun