The RLD10 makes pinpointing leaks as easy as one two! Detect leaking refrigerant using the high sensitivity mode then switch to the low sensitivity mode to pinpoint its source. If background noise makes the audible tic hard to hear, you can count on the color scaled LED indicators. With the RLD10 you'll get the latest in refrigerant detection at a great price. The RLD10 is backed by a 2-Year limited warranty.