Automatisches Ultraschall-Bellkontrollgerät mit zwei Hochleistungssendern, 20 Meter Reichweite, einstellbare Empfindlichkeit (7,6 m/15,2 m).

M-257 Automatic Ultrasonic Bark Control Device Dual High Power Transmitters 20 Meter Coverage Adjustable Sensitivity 25ft 50ft 75ft IP65 Waterproof Rechargeable Product Overview This device operates automatically without manual control and includes two built-in high-power ultrasonic transmitters. It provides strong output and a wide coverage area of up to 20 meters. The product offers three working levels at 25ft, 50ft, and 75ft. Higher values increase sound sensitivity and extend the working distance.   The right side of the device allows switching between fixed ultrasonic mode and frequency conversion ultrasonic mode. It is designed with IP65 dustproof and waterproof protection for both indoor and outdoor use. The built-in 2000mAh lithium battery supports USB fast charging and provides long standby performance. Core Functional Highlights Dual ultrasonic transmitters to enhance sound wave penetration and widen the effective range Three sensitivity levels for different working distances at 25ft, 50ft, and 75ft Dual frequency mode with fixed and variable frequency options IP65 dust and water resistance for indoor and outdoor use 2000mAh battery with USB fast charging and extended standby performance   Product Specifications Size: 124 x 77 x 42 mm Material: ABS and PP Battery: 2000mAh lithium battery supporting 5V and 2A charging Waterproof Level: IP65   Applicable Scenarios Suitable for home use to help reduce noise Suitable for outdoor training in parks or during walks Suitable for pet shops and kennels with multiple dogs This device offers wider coverage, longer battery life, and enhanced intelligent performance compared to traditional barking control products.   Usage Suggestions Start from the lowest sensitivity level at 25ft during initial use Clean the ultrasonic emission area regularly for best performance Keep the battery at around half charge during long-term storage This product is designed with automatic detection, high-power ultrasonic technology, long battery life, and a durable structure, making it a strong option in the dog training and barking control category.   Packing List 1 X Ultrasonic device 1 x  Instruction manual 1 x Charging cable