J-817 Electronic Remote Shock Bark Training Collar. This is an effective remote electronic product that is designed to encourageyour dogs good behavior or to warn your dog with its bad behavior via 2 different levels of static shock. Please place the receiver around your dogs neck and activate it with the remote controller.Features Press buttons from 1 to 8 to gradually achieve stronger static shock resultsPress A, B and C buttons to achieve sound results as “B-“, “B-B-“, and “B-B-B-“Low battery indication8 levels of Stimulation to correct your pets unwanted behaviors3 levels Tone Commands to train your pets with special meaningHumane design with high-tech computer programable technology ( MCU chip control )Waterproof receiver and transmitterRed light serves as low battery indicatorThe receiver has an LED light on sideSpecifications Height6.80cmWidth3.50 cmDepth3.00 cmTransmission frequency433.92 MHzEffective remote distance200 metersBattery6 Volt 4RL44 Battery as a giftPackage Includes 1 x 8 levels Remote controller1 x shock receivers with collar straps1 x 9 Volt Battery1 x 4RL44 Batteries1 x shock tester1 x ManualExtra Info Note: 1.Pls read the instruction carefully at first. 2.Dont make it too tight while the discharging point of the receiver can touch the neck of the pet. 3.The static impulse is to curb the improper deeds of the pet. Dont use it casually or to make fun of the pet. 4.Training the dog is to let it associate the static with the vibration. Reduce using the static gradually. 5.The strong static impulse is only used in emergency 6.If you do not use this product, take the collar and receiver off the dog and place them in a place without vibration.Dont wear it on the dog all the time. 7.If you dont use the collar remote for a long time, take out the batteries 8.There is a vibration sensor switch in the receiver,you just need to put it alone, then the power of it will be turned off automatically.