Your TV must be a digital TV to use this digital antenna. If it is an analog TV, you will need a digital converter box for your TV. You MUST rescan your TV channels any time a new antenna is attached. Your previously saved channels are synced to your previous antenna. You must resync the new antenna with the TV by rescanning the channels. Simply connecting the new antenna without rescanning the TV channels won't work! It is also highly recommended you rescan the TV channels after repositioning your antenna. Please make sure that you can receive the signal of TV channel before pasting it on the wall or window. Areas with large areas of obstacles, such as valleys and mountains, will reduce the effective range. Keep TV antennas away from power-hungry equipment, such as air conditioners, elevators, hair dryers, and microwave ovens. Working frequency: VHF (170-240 MHz) / UHF (470-860 MHz). VSWR: less than or equal to 5. Impedance: 75 ohm. LNA gain: 25dB. Color: black. Cable: 1.5C-2V, length = 4 m. Connector: Universal. Material: PC. Size: 210 x 120 x 0.6mm. Package Contents: 1 x antenna, 1 x connector, 1 x English manual. Only the above package content is included; other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture to be slightly different from the real thing. Measurement allowed error is +/- 1-3 cm.