Features: Multiple Modes: The product has sound training mode and ultrasonic driving interference mode, which can be switched freely according to needs, meeting different usage requirements. Three Ultrasonic Waves: Straight frequency, variable frequency, and hopping frequency ultrasonic modes can effectively drive away dogs without harming humans. Low Power Reminder: Equipped with a low power reminder light, it can remind users to charge in time to avoid affecting use due to low power. Long Battery Life: Built-in 300mAh battery, rechargeable, strong endurance, no need for frequent charging, convenient and practical. Wide Range of Use: The use range reaches 5 meters, whether at home or outdoors, it can easily cope. Specification: Color: Black Material: ABS Battery capacity: 300mAH 1.1wH Operating Voltage: DC 3-4.2V Standby Current: 16uA Maximum working current: 330mA Maximum charging current: 330mA Charging time: 2H Charger Specification: DC5V/500mA Product weight: 40g Package size: 80*39*128mm Package weight: 86.5g Package list: 1* Repeller 1* Charging cable 1* User manual