The mains power supply enables the PKI 2130 Digital Mains Recorder to achieve uninterrupted recording times of up to 50 days with smallest dimensions and this with an excellent audio quality during playback. In order to enable long-term recording, we reduced the transmission speed to 32kbps, just as with the PKI 2130. This digital main recorder is of course suitable for installation in socket outlets, junction boxes, lamps and other electrical devices. The PKI 2130 Digital Mains Recorder is used wherever you want to be independent of battery life and attach importance to long runtimes, but nevertheless prefer smallest possible dimensions for camouflaged installation. In case of a power failure, further recording is guaranteed by the built-in rechargeable battery.