Feature 1SAFETY MATERIAL: Handheld dog bark deterrent devices are made of premium plastic, safe and non toxic, stopping bad pet behavior, dog barking and repelling. 2RECHARGEABLE CYCLE: Ultrasonic bark control device is long lasting, cycle charging, charging method is USB connection charging, one charge can get 30 days of normal use. 3UV VIOLET LIGHT: Dog deterrent device with UV violet light, 365NM violet light beads, stray light filtering, safe and easy to use, can detect skin abnormalities such as ringworm in pets. 4MULTIFUNCTION: Ultrasonic anti barking device can also be used to detect human nose blackheads, skin diseases, pet fungus detection, cosmetic fluorescence detection, etc. 5WITH LANYARD: Dog barking control devices are equipped with a lanyard to prevent loss, easier to hold in a single hand, easy to operate. Easy to carry outside, high power, 25KHz frequency.Item Type: Ultrasonic Bark Control DeviceMaterial: PlasticUse: Ultrasonic Bark Stopper, Dog RepellerBattery Type: 1 x Polymer Battery (280mAh) (Shipped With Built In Battery)Size: Approx. 106x24mm / 4.2x0.9in .wang-edit-text{ font-family:'Arial' !important; } .wang-edit-text table { border-top: 1px solid #000; border-left: 1px solid #000; } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid #000; border-right: 1px solid #000; padding: 3px 5px; } .wang-edit-text table th { text-align: center; }Package List1 x UltrasonicBarkControlDevice1 x USB Data CableNotePlease allow some error due to manual measurement.