Yealink RT20U, 1880 - 1900 MHz, 1920 - 1930 MHz, 10 mW, Omnidirectional, 1968.5" (50 m), 11811" (300 m)
Yealink RT20U. Frequency range (EU): 1880 - 1900 MHz, Frequency range (US): 1920 - 1930 MHz, RF power: 10 mW. AC input voltage: 100 - 240 V, AC input frequency: 50 - 60 Hz. Width: 4.8" (122 mm), Depth: 0.472" (12 mm), Height: 2.44" (62 mm). Package width: 5.91" (150 mm), Package depth: 3.15" (80 mm), Package height: 3.54" (90 mm)