Features: Long Battery Life and Multiple Charging Methods: This device can stand by for 30 days on a single charge, and it can be charged in various ways, such as through a laptop, car charger, power bank, or USB adapter. It is convenient and quick, meeting different usage environments and needs. Effective Control Distance: The effective control distance of this product can reach 50 feet, which can effectively prevent dogs from barking and keep the environment quiet, whether indoors or outdoors. Waterproof and Durable Design: This product adopts an IP54 waterproof level, which is sturdy and durable. It can be hung anywhere indoors or outdoors without worrying about the impact of rain and humidity. Three Modes for Different Dog Breeds: This product has pulse mode, continuous mode, and frequency conversion mode, which can be selected according to the dog"s personality and habits, suitable for all sizes and breeds of dogs. Automatic Bark Stopper: This product is an automatic bark stopper for dogs, which can automatically detect and stop the dog"s barking without manual intervention, convenient and practical. Specification: Optional color: Black / Green Supply Voltage: 18650/3.7V Li-ion/1500mAH Charging current: 500MA Charging time: 4 hours Charge Management: With OVP function, can withstand up to 30V input voltage Shutdown Current: 17UA Standby current: around 440uA Normal Frequency Operating Duration: 40 days (100 triggers per day) Ultrasonic operating current: 100MA-210MA Button: one, long press for 2 seconds to turn on the power, and then long press for 2 seconds the display flashes 3 times to turn off the power Gear: 3 gears Shutdown voltage: 3V Low Battery Indication Voltage: 3.2V Sound pre-trigger: blue indicator light flashes once, the probe does not work Sound Trigger: The red indicator light will be on for about 4 seconds, the probe will work and the display will be on for 4 seconds. Ultrasonic probe: 25KHZ Microphone: support / -27DB Interface type: TYPE-C interface Adapter: 5V/1A Waterproof rating: IP54 Operating Temperature: -20 celsius to 60 Package size: 9.2 x 5.6 x 13CM Package weight: 180g Package List: 1 x Repeller 1 x Charging cable 1 x User manual