your model is only for your special unit, the standard unit uses Siemens which is around hk$6k if you check from retail. Dont know how to teach you ar..........
About the key, i read all the menu and tried it many times. I love it very much, and is not that difficult, you will enjoy not carrying the key with you later

Even it has no more battery power to operate, you can buy the standard 9V battery to operate it from outside. And I possibly decide to hide the key hold later with their provided cover.
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本帖最後由 Fibreline 於 2007-5-28 12:40 AM 編輯 ]