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Description
Who it's for: Suburban and metro homes within about 25–35 miles of their broadcast towers, with an attic, rafter shelf or high spot above the TV room. Also works on a bookshelf or behind a media console if you don't have an attic.
Where to place it: Stand it on a flat wooden rafter, collar tie or top plate, ideally on the side of the attic facing most of your towers, and at least a few feet from metal ductwork, water heaters or foil insulation.
An honest note on range: This is a compact passive antenna. It won't pull 60+ mile rural or cross-border stations, and anyone selling a small antenna that does is overpromising. Within its range, it beat antennas costing two to three times as much in our tests.
5–7 Day Shipping & 30-Day Returns
Free 5–7 Day US Shipping: Every order ships free with full tracking and delivers in 5 to 7 business days.
30-Day Trial: Try it at home for 30 days risk-free. Need help? Email us anytime at support@buycosari.com.
2-Year Warranty: If anything goes wrong within 2 years, we replace it free of charge or refund your order in full.
Why Choose the Cosari OmniMast V3?
Solid Brass Coupling
The mast threads onto a machined brass stud, so the joint stays tight through attic heat and winter cold.
Weighted, Stick-Down Base
A round matte black base with a red peel-and-stick pad keeps the mast upright on a rafter, even with the cable pulling on it.
Pays for Itself Fast
At $34.99, it costs less than half a month of live-TV streaming and keeps delivering local channels for free.
We're in Western Pennsylvania with mountains around us, and this antenna is picking up pretty well. It does seem to receive from all around, so I haven't had to keep turning it.
Verified Purchase · Johnstown, PA · Cosari OmniMast V3
✓ Verified Purchase
Laura M.2025-11-03
Looks nice, works well
Very good reception, and I get all the local channels I was looking for. The black rod and little red rings look nice too, so I don't mind having it out.
This antenna is the bomb! I already bought a second one. We spent over $100 on an outdoor antenna that was just okay and got about 35 channels. This little indoor one rocks.
Easy to set up. I set down the weighted round base and connected the coax to the TV. With everything changing, it's nice to use a simple antenna for local channels again.
Verified Purchase · Tulsa, OK · Cosari OmniMast V3
✓ Verified Purchase
Paul W.2025-07-14
Impressed at 25 miles
I'm about 25 miles from the broadcast tower and I'm very impressed with how this little antenna performs. It was easy to get connected and reception has been good at my house.
Verified Purchase · Madison, WI · Cosari OmniMast V3
✓ Verified Purchase
Brian K.2025-10-21
Works for my high-VHF stations
Oops, yes, CBS is high VHF here. NBC is too, and the NBC tower is 32 miles away. This little vertical antenna handles both stations and has been working great for me.
Verified Purchase · Albany, NY · Cosari OmniMast V3
✓ Verified Purchase
Steve J.2025-09-09
Easy HDHomeRun setup
I'm currently using this in the attic of my detached garage, connected to an HDHomeRun. Setup was really easy, and it's been a convenient spot to keep the antenna out of the way.
Verified Purchase · Fort Wayne, IN · Cosari OmniMast V3
✓ Verified Purchase
Rachel S.2025-11-17
Clear locals from the attic
I set the round base on a wooden beam in the attic, away from the HVAC ducts, and ran the coax to our living room TV. Local channels come in crystal clear at 1080p, with no outlet needed up there.
I unscrewed the mast from the round base to test my cable route, then screwed it back onto the brass thread. Stuck down the red adhesive pad so it wouldn't tip. Getting 22 channels with no fuss.
Verified Purchase · Indianapolis, IN · Cosari OmniMast V3
Get Your Local Channels Back, Free, Starting This Weekend
$34.99$69.99 Free Tracked Shipping (5–7 Days) Included
In Stock – Free 5–7 Day US Shipping · 30-Day Risk-Free Trial.
Frequently Asked Questions
Does it need an electrical outlet or USB power in my attic?
No. The OmniMast V3 is fully passive. There's no amplifier, no power inserter and no outlet needed anywhere.
Will it pick up High-VHF channels like CBS and NBC?
Yes. The vertical element covers both UHF and High-VHF. In our test it held High-VHF CBS at 25 miles and NBC at 32 miles.
Does it work through roof shingles?
Yes. Asphalt shingles and wood decking let TV signals through with modest loss. Foil-backed radiant barrier insulation and metal roofs block signals, so attic placement won't work under those.
What connector is on the cable?
The attached cable ends in a silver 75-ohm coax plug with a knurled metal grip collar and a center pin. Check your attic line, splitter or tuner input before you start. If it's a threaded F-type jack, a simple coax adapter or barrel gives you a snug connection.
How does it stay upright on a rafter?
The round matte black base is weighted and has a red peel-and-stick adhesive pad underneath. Press it onto clean, dust-free wood so cable tension can't tip it over.
Will it work with NextGen TV (ATSC 3.0) and 4K broadcasts?
Yes. Antennas don't care about the broadcast format. If your TV or tuner supports ATSC 3.0, it will receive those stations through the OmniMast V3 automatically, along with standard 1080i/720p ATSC 1.0 channels.
