Upgraded Enhanced Ultrasound: The anti barking device has been upgraded completely, and the Enhanced Ultrasound function has been added to the basic Normal Ultrasound function, equipped with a specially designed enhanced adjustable ultrasonic gear. Meet more training needs, effectively prevent dogs from barking, fighting, scratching and other bad behaviors30FT Effective Control Range: The dual ultrasonic sensors design breaks through the technology of the original ultrasonic equipment. Compared with other anti barking ultrasonic equipment, the ultrasonic directivity is more accurate, the effective control range is more stable and can up to 30 feet. The indoor and out training can be more easyEasy In Night Activity&Training: The new upgrade of the product is equipped with dual led strobe lights. It is suitable for walking camping or training at night training at night. Maximize the safety and training effect at nightType-C Recharging: The device built-in 850mAh rechargeable battery. It only takes 2 hours to charge, and it will be standby for 15-30 days (depending on the frequency). The product is equipped with Type-C charging cable, which can be easily charged through a variety of devices, such as power bank, laptop, etc. No need to worry about the impact of low power on training effect any moreSafe And Effective: The ultrasonic emission frequency of this barking device is 25kHz to 30kHz, which is always within the hearing range of the dog and will not cause damage to the dog's hearing and human health.The protection mode will automatically stop working when the product is long-pressed for 10s. Effectively prevent additional damage to dogs