Attach the key detector to your car key ring or other easily misplaced items and forget about ever losing them ever again. Using any of your telephone handsets, you can activate the key detector's beeping alarm and quickly track down your lost keys from up to 200 yards away. DECT 6.0 PLUS takes the superb sound quality and outstanding range of DECT 6.0 phones to a whole new level. By increasing the frequency of error correction up to 80x, the transmission quality is improved and the phone's range is extended