Gb - 27 Checking/reloading battery of receiver collarTo check the condition of the battery, observe the indicator light located on the front of the receivercollar:• Battery sufficiently charged: flashes slowly green.• Weak battery: flashes quickly green.When the battery is too weak, the product switches to safety mode and the system locks up.Recharge the battery by following the procedure indicated above, at the beginning for this user’s guide (see§ Charge of the EXPERT collar). Changing the contact pointsTwo different series of contact points are supplied. The length of the contact points must be sufficient tohave proper contact with the dog’s skin, enabling the device to operate correctly.If you have a long-haired dog and the short contact points fitted to the collar in the factory are inadequate,remove and replace them with the long ones supplied with the kit. Carefully tighten them manually (donot use a key).You can purchase extra-long contact points from your supplier at any time. How to check that your EXPERT 600 is functioning properlyYou can check that your EXPERT 600 is operating correctly at any time.- Before doing so, make sure the receiver collar is turned « off ».- Fix each wire of the neon test lamp under each contact point (unscrewing them lightly and retighteningthem so as to pinch the test lamp wires).- Turn « on » the remote control and receiver collar.- Press the F or C button and modify the intensity level of the stimulations: the test lamp will light withmore or less intensity. Getting the best resultsThe training instructions you send to your dog are sent from the remote control to the receiver collar byradio waves. These radio waves are sensitive and the range reaches approximately 600 meters (dependingon geography and environment).The performances of your EXPERT 600 will be optimal if you follow these recommendations: