Detectable Medium (6) ------------------ Aluminum (1) Copper (1) Gold (5) Iron (5) Metal (2) Silver (5) Built-in Devices (5) ------------------ Speaker (5) = >= <= Channel Frequency (3) ------------------ 915 MHz (3) = >= <= Maximum Operating Distance (3) ------------------ 6561.68 ft (3) = >= <= Number of Total Buttons (3) ------------------ 2 (1) 4 (2) Wireless Technology (3) ------------------ RF (3) Product Family (2) ------------------ ME4600 (1) UCS 6200 (1) Environmental Compliance (1) ------------------ Restriction of Hazardous Substances (RoHS) (1) = >= <= Standard Operating Frequency (1) ------------------ 7.50 kHz (1) TAA Compliant (1) ------------------ Yes (1)