Features The main functions of the product flashlight sound vibration intensity can be adjusted electric shock intensity can be adjusted support a remote control can link two receivers A B the actual distance of wireless remote control is about 250 meters The theoretical distance is 500 metersThree modes of independent channel and key lock function A channel parameters can be set independently B channel parameters can be set independently A B common channel parameters can be set independently The key lock function is activated by long pressing for 3 seconds After the key lock function is activated the remote control does not emit a signal and only the battery icon and the key lock icon are displayed on the display The adjustable level of electric shock and vibration is 0 99 and there is only one sound no levelFlashlight function Long press for 3 seconds to turn on the flashlight short press to turn off the flashlightDescription Collar Length About 70cm 27 5 InchWork Time Remote 60 daysReceiver 15 daysCharging USB ChargingMode Beep Shock Vibration FlashlightRange 1650FTPackage Included 1 x Remote Control 1 x Receiver CollarPlease Note 1 Please allow 1 3cm error due to manual measurement 2 Please understand that colors may exist chromatic aberration Thanks for understanding