Pendant water-resistance - Water Spray Standard IPX4 (shower only). Number of Pendants/Base Unit - Up to 4 Pendants can be programmed to one Base unit. Pendant Batteries - 3.6 (or 3.7) volt 300 mAh Li-Ion (2 pieces) battery size 10440. Operating Range - Up to 600 feet. Covers your typical American house and into the front, back. Works with the LogicMark FreedomAlert System.
