Features:1. Made of plastic and nylon material, safe and non-toxic, durable, no harm to your pet health. 2. Low power charging, long term usage, nylon color, soft material, wear-resistant skin. 3. Vibration level can be adjusted according to the volume of the dogs sounds. It is basically set to level 3, but can also be set to level 5. 4. When the dog barks, it will start to vibrate. When the dog is roking, it will vibrate for a longer time until the dog stops barking 5. Unique vibrating color improves the memory of your dog, and immediately learns to remind you to quietly feel of vibration. Specifications: Item Type: Dog Vibration Color Material: Plastic + Nylon Color: As the pictures show weight: approx. 80.0g/2.8oz Battery: 180mAh Lithium Battery 502025 x 1 (Included) Product Features: Vibration Work Method: Automatic Barking Control Application Range: Small and Medium Dogs How to Use: 1. Turn on the switch on the bottom of the transmitter and set the desired mode 2. Debug strength and install nylon collar 3. Just put it on the dog Package List: 1 x Color 1 x Data Cable x 1 x 1 x 1 x Data Cable Transmitter 1 x Manual