Electro-Store4U Description: TV antenna amplifiers are used to overcome signal loss related to long cable runs and splitters. It will extend the range and signal quality of your non-amplified digital HDTV antenna. Signal Gain20dB Frequency Range47-862MHz Noise Figure<4dB Power Supply DC 6V 100mA by external adapter or DC 5V from USB source Coax Cable (charger cable)2.6ft cable included FeaturesThe amplifier / booster can enhance the signals weakened by the obstructions between you and the towers, but can not add signals NoteWe do NOT recommend to use this amplifier / booster if your house is very close to the broadcast tower and the signal is already very strong. A booster will cause self-oscillate and you may get fewer signals than without. Before buying this amplifier, please check stations according to your zip code, by following the next link: DTV Reception Map. If you received few Green and Yellow channels, you will need an amplifier Included1x Power insert, 1x Adapter, 1x USB Cable Shipping Policy: Free shipping to USA. Shipped within 1 business day via DHLUPSUSPS. (please contact us if you need it shipped using a specific carrier). Tracking numbers will be sent to the email address that is associated with your paypal account. Some items are not shipped using tracking numbers International shipping is done using USPS first class mail only, which has a trackable number and could take up to 20 business days to deliver to some countries. Please verify with your customs before purchase. Return Policy: 60 days money back. Please return item to address shown on package. The original receipt or a record of the purchase is REQUIRED on all returns. Return products must also be in its original condition. Including box UPC bar code packaging and all other accessories. S&H is non-refundable. Please note - Any return for any reason other than defective or wrong item received will be refunded partially only due to restocking feesopen box items. If the item is not defective, the shipping costs will be decreased from the refund amount.