Has BNC Male to BNC Female Prevents video-signal distortion caused by video ground loops, picture tearing, cross talk and rolling Prevents power cables laid by others interfering with the cctv system Surge ESD Immunity Power supply: No power required, plug and play What's included: 4x of Ground Loop Isolators Shipping and Return Information We usually ship the items within 24 hours after your payment.  After the item has been shipped, I will post a tracking number. This item is shipped to only U.S domestic, not international. We are located in NJ.  Return Information You can return the item within 30days, shipping charge is not refundable. Also, return can be only accepted with original box.  The returned item must be 100% resalable condition which includes all original accessories.  You are responsible for shipping cost. You must use UPS or USPS that provide a tracking number. If there is any physical damage found after we get the item back such as scratches, dent..etc, no money will be refunded. Please contact us first before you return, RMA number must be provided before you return the item.