Product Description: ①4 Customizable Training Modes - Features Beep (1-8), Vibration (1-16), Safe Shock (1-99 levels), and Shock Boost (+10% intensity). Perfect for basic obedience, barking control, and behavior correction—indoors or outdoors. ②Massive 4500FT Remote Range - Train with confidence in open areas like parks, beaches, or trails. ③2 Channels - Supports dual-dog training with one remote and automatically stores individual settings for each pet. ④IPX8 Fully Waterproof Receiver - Designed to withstand rain, mud, swimming, and accidental submersion. Let your dog play freely in any condition—no worries about water damage. ⑤User-Friendly Remote with HD Color Screen - Large backlit LCD offers clear visibility day or night. Intuitive button layout allows easy navigation and level adjustment—suitable for all experience levels. ⑥Long Battery Life & 2-Hour Fast Charging - Collar offers 35 days standby, remote lasts 45 days. Quick recharge ensures minimal downtime—ideal for trips, daily use, and extended outdoor adventures. ⑦Adjustable & Comfortable Fit - Fits dogs with neck sizes 7.8" to 24.4", making it ideal for small (10+ lbs), medium, and large dogs up to 120 lbs. Durable yet soft material for wearing 12 hours a day.