I am not aware how to pair this. Remote does power in.

This PATPET P650 Dog Training Collar Replacement Remote ONLY is perfect for dog owners who want to train their pets using ultrasonic technology. The remote control feature allows you to control your dog's behavior with ease. The collar is suitable for medium-sized dogs and is made by Patpet, a trusted brand in the pet supplies industry.

The model number for this product is P-Collar 650 and it is designed to be effective in controlling barking and other unwanted behaviors in dogs. The collar is made in an unknown country or region of manufacture. This product is categorized under Pet Supplies, Dog Supplies, Training & Obedience, and Bark Collars.