Aetertek At-216D Replacement Receiver Waterproof Dog Shock System 600 yards Beep Vibrate bark control Updated 216D replacement rechargeable receiver collar 100% waterproof Aetertek pursue the highest standard on material selection, exquisite craft processing. We are premium on quality and performance.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. Aetertek receivers using 5.0MM pore size on charging port which can be charged repeatedly and never deformation and worn, 100% Safety and reliability. Aetertek collar with 3 types correctional methods: beep, vibrate and shock. Respond quickly, and can keep working until you release the function button. It is easy for user to build up a series training command through combined three corrections and duration time. 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.