Dog Deterrent Dog Bark Deterrent Devices Water Resistant Rechargeable Portable 3 Modes Multifunctional Pet Dog Barking Trainer for Indoor Outdoor Specification: Color: Black Supply Voltage: 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) Ultrasound 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. Ultrasound probe: 25KHZ Microphone: support / -27DB Interface type: TYPE C interface Adapter: 5V/1A Water resistant rating: IPX4 Operating Temperature: -20℃ to 60