Battery backup: Up to 12 hours (4 AAA batteries not included).
Way speakerphone: 2 way voice communication between console and receiver of the call.
External Power: DC 6V - 110v-220VAC input adapter (Included).
Panic Button frequency: 433.92 MHz (Will not interfere with any other electronics or pacemaker).
Panic Button range: 100 Feet from base (depending on environment).
Size: Necklace Panic Button- 2 inches long (top to bottom), 1.25 inches wide (side to side), 1/2 inch thick.
Size: Wrist Panic Button- 1.5 inches long (top to bottom), 1.25 inches wide (side to side), 1/2 inch thick.
Size: Wrist Strap is 9 inches long.
Weight: Panic Buttons weigh less than 1 oz. each with the battery installed (these are very light panic buttons).
Power: ON/OFF switch control (Turn unit off when away from home or traveling, or to cancel an alert).