Mounts securely to the back of all QSI 500/600 series models. Liquid-cooling provides up to 10°C additional cooling of the CCD image sensor. Two hoses attach to the exchanger with self-sealing, quick-disconnecting couplings to prevent leakage of recirculating water. Please note, this liquid heat exchanger is not compatible with the larger body cameras ie. QSI-6162 and should only be used with water.