The Tronair portable cabin pressure tester operates using common shop-air; no other source of power is required. This small, quiet unit replaces outdated larger testers and is used in place of diesel driven units. The unit is U.S. Air Force approved for use on the F-16 and A-10 aircraft utilizing current AF Instruction Manuals and Tech Orders. This commercial-off-the-shelf unit has an extensive history of reliability and ruggedness in the commercial environment. For more information call (800) 426-6301 or visit www.tronair.com.