Working Frequency : VHF (170-240Mhz) / UHF( 470-860Mhz) VSWR : less than equal1.5 Impedence : 75 Ω LNA Gain : 25dB Reception Range : 120 miles (Max) Cable : 1.5C - 2V / Lenth = 4m Connectors : Universal Polarization ： Linear Voltage : 5V Power Supply Connector : USB Operation Temperature : -45 ~ 85 Celsius Storage Temperature : -45 ~ 85 Celsius Compatible with 720p, 1080i, 1080p/ ATSC Set up guide : Step1 : Connect of attached coaxial cable to the ANT/IN connector on the back of the TV or Digital Converter Box, Plug the USV plug into the USB port of the TV or Digital Converber Box. : Hand held the antenna, near the window, place it horizontally or vertically. Step 3 : In the TV’ s or STB ’ s setup menu, set the tuner mode to " Antenna " or " Air " For more detailed instructions, please refer to your TV manual. Step 4 : In the TV ’s or STB ’s setup menu, set TV to " scan " for channels. This can sometimes be listed as auto-program,auto-scan,channel search or channel scan. Consult the TV manual or detailed instructions. Step 5 : If reception is sporadic, try moving the antenna to another location and rescanning the TV until optimal postition is found. Step 6 : Fix the antenna at the optimal position you found. Colour: Black Material: ABS Size: 21.8 x 3.5cm Package Contents: 2 x Indoor Digital TV Antenna 2 x adapter 2 x Manual Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.