Features: Ultrasonic technology: Using advanced ultrasonic technology to drive dogs, effectively preventing dogs from barking or behaving improperly. LED indicator light: Build in LED light, can be used at night or in low light conditions, ensuring visibilities during training and improving safety. Portable Design: Small size and lightweight, easy to carry, can place in a pocket or attach to keychains for training. Multiple gear selection: Supports multiple frequency adjustments, allowing users to flexibly adjust according to their dog's reaction, ensuring the best training effect. Full of durability: Quality materials to enhances the durability and applicability of the product. Specifications: Material: ABS Color: orange, black(optional) Size: approx. 106x24mm/4.17x0.94inch Power: 25KHz Lamp beads: 365nm Package Includes: 1 Piece Anti Bark Device 1 Piece Charging Cable 1 Piece Wrist Lanyard note: Please allow 1-2cm errors due to manual measurement. Please allow for slight color differences due to different display resolution.