✅ Smart Dual-Sensing Tech Precisely detects barking via vibration + sound sync technology (patented chip). Eliminates false triggers from other noises. ✅ Perfect for 5-15lbs Small Dogs Ultra-lightweight receiver (only 62g!) with adjustable strap. Designed specifically for small dogs' comfort & safety. ✅ 4 Training Modes + Safety Lock Choose from Sound/Vibration/Sound+Vibe/Sound+Boosted Vibration. Auto Safety Mode activates after 7 triggers to protect your pet. ✅ IP67 Waterproof & Clear Display Swim-proof design (submersible 30mins). Color screen shows mode/battery intuitively. Easy 2-button control. ✅ 15-Day Battery & Magnetic Charging 300mAh polymer battery lasts 2 weeks. Magnetic charging (no ports!). Adjustable sensitivity (1-8 levels). Zeasoyo Smart Training Collar for Dog: Automatic Anti Barking Collar Rechargeable Waterproof Bark Collar Humanized Training Modes: The bark collar combines 6 training modes through beeping, vibration and electric shock, you can choose the right training mode according to the actual situation.1-8 levels of sensitivity adjustment allows you to use the progressive training function. Rechargeable & Extra Long Standby: Medium size bark collar for dogs adopts new magnetic charging method, fast charging via USB, 2 hours charging, can be used for 15 days, no need to charge frequently. The bark stopper can be adjusted according to the ambient noise, effectively filtering other dogs' barking. Automatic Anti-Barking & Protection: The anti-bark collar for dogs is fully automatic. With smart bark recognition chip and motion detection technology, it will only activate when it detects both vocal cord motion and barking sound, it also has a safety shut-off function, if it is triggered 7 times, it will temporarily stop working for 1 minute. Adjustable & IP67 Waterproof: The strap of this large dog bark collar is made of skin-friendly and durable nylon, you can adjust the size of the bark collar as you like. The dogs collar is IP67 waterproof, so you can enjoy training time with your dog at the pool, park, beach, or backyard. Easy to use, effective and helpful. Worry-Free After-Sales Service: If you encounter any problems in the process of using this anti-bark collar for dogs, we will provide 24/7 attentive customer service for you to answer, and provide a one-month warranty service, so that you can use it with confidence.