APE6600 01.Without any host or control center, directly receive signals of pager. APE560 01.Equipped with waterproof base * 02.With manual/automatic power saving function. 02.Stable login mode * 03.Two prompt modes of vibration and music. 03.Anti-temperature and humidity changes * 04.LCD display with sleep function,effectively extending the standby time. 04.The number can be changed optionally with strong re-use ability