Serene Innovations PG-200 Two-Way Personal Pager System Easy-to-use, wireless, two-way paging at the press of a button - with confirmation your page was received Pagers have super-long range (up to 100 ft) to transmit & receive alerts throughout the entire house Three alert modes - bright strobe-light flasher; adjustable-volume ringtone; and strong vibration Lightweight, compact, and easy-to-wear - pagers include belt clip and wrist-strap lanyard PG-200 System includes: 2 Pagers with built-in rechargeable batteries and 1 micro-USB AC charger