I bought the range extender as my Panasonic KX-TG8424 phones' range is pretty poor. This range extender was suggested to boost the signal by Amazon and the price and reviews of the Panasonic own brand range extender made that one unappealing.
The range extender is much smaller than I expected. Which is good. It is 12cm x 12cm. A plain black plastic rectangle with a single red LED. The box contains the range extender, the power supply and a screw to fix it to the wall.
Getting it working has taken 3 hours of trial and error, using the complicated reset instructions. For those of you with the KX-TG8424's I thought I would put down how I got the range extender working. The auto registration doesn't work with them.
1. Set the range extender up near the unit then move it to its final destination later. My phones have a longer range than the extender. DO NOT PLUG IT IN YET!
2. First of all go to the phone main menu on the Panasonics, then to "base unit set up" and turn on the "Repeater". It is the last option there.
3. Now plug the power into the range extender for between 1-5 seconds and turn it off again. Then turn it back on. The LED slowly flashes and it is now in registration mode.
4. Go to the phone base unit and press and hold the PAGE button (bottom right on the panel) The base unit will beep continuously.
5. The LED on the extender flashes frantically. Take a handset, push and hold the DIAL (green) button until the LED stops flashing then press 5 (1-4 are already taken by the handsets if you have the 4 set) The LED on the extender will flash 5 times (I forgot to count but it worked). Then press * and hang up.
6. The repeater will restart and then the LED comes on and stays on.
7. Now it is done. Next move the repeater to where you want to extend the range. If it is in range the LED will remain continuously on when you plug it in. If it slowly flashes it is out of range so move it closer to the base unit until the light stays on.
8. Next, when you try out your new range you will hear a squeaky beeping noise every now and again. You begin to think the extender is broken, how can you live with this, then you read the manual and it is the extender telling you it is working. Go back to the repeater, switch it off. Switch it on for 1-5 seconds. Switch it off again. Switch it on again. The LED slowly flashes. Switch it off again. Switch it on again and there is now no tone. DONE!
All of the above is scattered throughout the manual but I thought it might help to steer you to what works for the Panasonic handsets.
Hope the above is of some help!