It works perfectly with my DS212j and Synology which recognizes that the reports all incidents of supplies. I thought taking a capacitive device, but the fact of winning a few minutes is not essential compared to done correctly darrêter disk. It comes with a strange decision that starts with an RJ11 plug, which ends with a USB plug to connect to the NAS. It comes without a power cord, and yet it is not an error: the devices to protect cords (NAS, popcorn) serve as power plug and the 2 supplied cords are compatible with their processors. The implementation boils down to: plug, switch. The operation is very quiet, except the alarm in case of power failure.