Check the listing for details. Logicmark 37911 LifeSentry Personal 2-Way Voice Emergency Response System. Condition: New. Listed at 95.00 USD. Logicmark 37911 LifeSentry Personal 2-Way Voice Emergency Response SystemProgrammable to any central station. Primary and secondary number and 4 digit user ID code. Choose your own 4 digit dealer security code. Choice of daily weekly or monthly periodic test intervals. Choice of transmitting restore codes. Can be programmed or downloaded remotely over the phone. Full supervision: Pendant communicates with base station every 13 hours to ensure proper connection. Central station is contacted in event of a power outage or low battery or loss RF signal. Audible prompts during set-up programming testing and full system check. Pendant has rechargeable lithium-ion battery. Hours of talk time or up to 6 months standby time on a single charge. 24 hour emergency battery back-up. Combination of 4 pendants or Emergency Wall Communicators programmed to one base. Water resistant pendant. Built-in line-seizure relay seizes line during an emergency (optional use). Condition is "New". Shipped with USPS First Class.