Aetertek Updated At-918C Replacement Receiver Add on Receiver Aetertek 918C dog shock collar Rechargeable and Submersible receiver (genuine waterproof) 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. 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 match and got all necessary certification which meet USA and EU standard, such as CE, FCC, RTTE, ROHS and so on. 1 year warranty is guaranteed.