Brand new handheld ultrasonic training and driving dog machine. Protects you from vicious dog attack Trains pet to be obedient, corrects misbehaviors and stops barking Effective yet no harms to dog The training dog machine is based on the theory that ultrasound (more than 20KHZ) is above the upper limit of human hearing, but within the dogs. It has the following three functions--- training all kinds of dogs such as that are used as pets, in police and for shepherding; expelling ferocious dogs effectively and also illuminating. It can be used as a torch at usual time. Functions: dog training, dog repelling, LED light Dimension: 130 X 40 X 22 mm Weight: 98g Frequency: 25 KHz Max current: 130 mA Power: 9V battery Please note: it usually needs at least 2 weeks to take effect for dog training Using methods: Training the dog:Turn the function changing switch (below) to the middle-grade, and press the buttons witch BEAM (above). For the further information, please refer to the following article How to telecontrol your lovely dog. Driving the dog:When you are confronted with ferocious dogs, please turn the function changing switch to the last grade. Aim at the ferocious dogs and press the BEAM button, and then the dog will feel terrified and get away immediately. Illuminating:Turn the function changing switch to the preceding grade and press the BEAM button. It can be used as a torch. Power:9 volts fold level battery. Attention:Dont emit ultrasonic wave to your ears directly! This can let people feel uncomfortable. Youd better not use training dogs grade (middle) to illuminate, because the amount of current consumption in this grade is more than five times than that of lighting-grade. Package included: 1 x Ultrasonic dog trainer repeller 1 x User manual 1 x 9V battery