The US Army Research Laboratory requires upgrades to Qty two (2) Muller Optical Hydrophone devices of which the Government already owns. Extended description as follows: Qty two (2) Very Sensitive Laser Hydrophone for the pressure range from 1 Megapascal (mPa) to 10 Kilopascal (kPa), 10 Hertz (Hz) to 2 Megahertz (MHz) in water with a customized 15-meter light guide connector; Laserbox conversion to new sensor with 15-meter fiber optic cable (upgrade the current 5-meter cable with a 15-meter cable and then calibrate the upgraded system). Shipping and Handling costs must also be