Aetertek At-918C Add-on Receiver Submersible (100& Fully Waterproof) Dog Collar Updated Aetertek Receiver Replacement Aetertek AT-918C Replacement receiver collar Aetertek collar with 3 types correctional methods: beep, vibrate and shock. Respond quickly, and can keep working until you release the function button. Aetertek collar use the most advanced design, electromagnetic induction switch solution, on the power ON/OFF switch to ensure unlimited accurate switch, more convenient and reliable. Aetertek receivers DC base adopt embedded injection molding process, and equipped with high-precision-waterproof ring with built-in guide slot , ensured waterproof effect over 3 hours underwater 50cm. No leaking concern when pet in the shower, swimming, diving and other under water condition Aetertek match and got all necessary certification which meet USA and EU standard, such as CE, FCC, RTTE, ROHS and so on. one year unconditional quality warranty. All of our effort are for pets and our users.