Specifications Operating Voltage: 3.7V Battery Capacity: 300 mAh rechargeable Li-ion Input Voltage: DC 5V/1A (USB-C charging) Waterproof Rating: IP67 Operating Temperature: -10°C ~ +50°C Storage Temperature: -20°C ~ +60°C Net Weight: 68 g Fit: Dogs 8120 lbs; adjustable collar strap 027 inches Key Features Stable Performance: Unaffected by head shaking, other dogs barking, or ambient noise USB-C Charging: Standard Type-C port for fast, convenient recharging Adjustable Sensitivity: 8 sensitivity levels to match different breeds and environments Flexible AntiBark Modes: Modes can be freely combined Beeping only Beep + Vibration Beep + Static correction Beep + Vibration + Static correction