? We Confidently Guarantee the Quality for 2 Years: Our friendly and reliable customer service will respond to you within less than 12 hours. 100% satisfaction, no risk of purchg. For any concerns, please do not hesitate to contact us and we will solve your issue immediately. ✓ADJUSTABLE REFLECTIVE STRAP FITS ALL DIFFERENT SIZES, WEATHERPROOF AND LIGHTWEIGHT: Our nylon strap covers neck range from 19 to 60cm and fits a size from 7 to 55kg, fits small, medium and large dogs. Collar only weighs 70 grams, no burden for your dog. IPX6 rainproof makes sure collar works in rainy day. ✓RECHARGEABLE LONG BATTERY LIFE, LCD DISPLAY, ECO AND AUTO-PROTECTION MODE: USB Charging Battery lasts more than 14 days, and only needs 1 hour to charge. Press power button the LCD display shows the current power level. Collar sits in the ECO mode if it is not activate. If the collar activated 7 times in one minute will enter auto-protection mode and save your dog from accident. ✓ADVANCED SMART CHIP AND VERIFIED FOR SAFENESS: HVRSTVILL bark collar has the latest technology of detection with a sensor senses both barking vibration and sound. It distinguishes your dog barking with other dogs and does not interference with other sound. Our no shock anti bark collar has been certified for US & EU markets with FCC and RoHS certification. This no bark collar trains your dog in the safest way. ✓ONE COLLAR SET YOU FREE: Our anti bark collar has 2 training modes & 7 adjustable intensity levels. 2 training modes ‘beep’ and ‘vibration’ can be turned on or off separately according to your needs. 7 levels adjustment allows you to choose the appropriate intensity according to the size of the dog. You can increase the intensity to prevent your dog from adapting to this item, then effective solve the problems.