Chamberlain NLS1 Add-On Wireless Intercom For Ielnls2

CONVENIENT, EXPANDABLE COMMUNICATION IN A HOME; 1,000-FT RANGE WITH NO WIRES OR POWER CONNECTION; CLEAR, SECURE 900 MHZ DIGITAL COMMUNICATION; HIGH-TECH, CONTEMPORARY DESIGN; EASY TO USE; VOICE ACTIVATION; MONITOR MODE; SINGLE OR MULTICHANNEL COMMUNICATION; EXPANDABLE WITH UP TO 12 UNITS PER NETWORK; 2-YEAR BATTERY LIFE REQUIRES 4 AA BATTERIES PER UNIT; 1-YEAR ; ADD-ON INTERCOM FOR IELNLS2- SKU: PEIELNLS1