Battery (4) charged, output amplifier, input amplifier, varometer and oscillator, battery pack is separate with headphones, battery pack has canvas carry bag with alice pack clips for belt attachment. Different switches: Lo, Intermediate, and Hi. Base is 9-1/2" x 11", short handle measures 30" from base to end of handle, long handle measures 61" from base to end of handle, aluminum handle, includes metal carrying/storage case (original) and extra batteries. Model no. P-190, serial no. 17634, contract no. DAAK-01-71-C1896, MFR: Polan Industries, FSN 6665-181-0432.