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Handset Lifter Before removing the adhesive tapes, hold the Once you have found the best place HSL 10 on top of or close to the loudspeaker of to attach the HSL 10 to the your telephone. Test the lifter’s position by...
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Adjust the lifting height of the HSL 10 Teach/record one or two different ring as follows: tones of your telephone as follows: 1. Press and hold the “P1“ and “P2“ buttons 1. Press and hold the “P1“ or “P2“ button until the LED flashes blue and red.