Mastercool introduces a hand-held combustible gas leak detector that detects leaks fast and accurately. It has a flexible 15-inch probe with a built-in LED light, six sensitivity levels with audible and visual indicators, and rechargeable Ni-MH batteries. The detector can identify leaks in over 20 combustible gases and has a warm-up time of 25 seconds, operating temperature of 32-125°F, and battery life of 8 hours per charge cycle over 1000 charge cycles.