Gentle Leader SpraySense Anti-Bark Collar - Quick Tips
Adjusting the Collar Strap: The device should be positioned so that the spray is directed frontward under the jaw. Allow 1" to 1 ½" inches of slack in the collar - this will allow gravity to keep the unit centered under the jaw (approximately 1-2 fingers under the back of the collar strap). It is not necessary for the collar to be tight - the device uses a microphone to detect sound rather than physical vibrations.
Battery: When installing the battery, be certain that the positive and negative ends are properly aligned. See "+" and "-" symbols inside battery compartment. Always remove the battery when the collar is not in use in order to prolong battery life. (The microphone will be in continual "listening" mode whenever the battery is in the unit.)