Description: brand new and high quality. Feature: Do not connect it to the transmitter as it may cause damage to the pre-amplifier. Local radiated noise reduction up to 30dB compared to long line antennas. 8-shaped pattern provides deep mute points to further reduce interference. USB power supply, easy to get power. The self-contained feeder simplifies the installation process. Simple structure, can be easily installed to balcony, roof and other positions. No need for manual adjustment, low-key installation, no need to worry about neighbors and property. Modular design, easy to install and maintain. Stainless steel ring vibrator, easy to install, easy to maintain. Rain proof for shell, can be fixed for outdoor use for a long for time. Attention: Need to prepare a PVC casing for support with any diameter but with a certain strength. You can also use the bamboo pole, wooden pole, etc, not to use metal pole. Specifications: Item Type: MLA-30 Amplifier Antenna Model: MLA-30 Frequency Range: 100kHz-30MHz Material: Plastic+Metal Size: 10m/393in Color: Black Quantity: 1 Set Note: No retail package. Transition: 1cm=10mm=0.39inch Please allow 1-3mm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! Package Includes: 1x MLA-30 Amplifier with 10M cable 1x Stainless steel vibrator 1x Bias supply 1x USB cable 0.8m 1x 60cm SMA jumper cable 2x Stainless steel fixing screws