Wholesale Customizable Multi Antennas Portable Jammer SG-HJ-8, Hand-Hold Cellphone Signal Isolator for Conference & Car Use

You’re tired of spotty signal blackout zones where one device still rings or pings through—this unit handles that with eight antennas on SMA connectors covering 850/900/1800/1900/2100/2300/2400/2600/3300/4800MHz, so 2G through 5G plus WiFi and Bluetooth get hit.

It takes about 20 seconds to reach full shielding from cold start, and the radius runs 1 to 20 meters depending on environment and signal strength—concrete walls drop it toward lower end, we’ve seen that in field tests.

Runs off AC 100-240V at 50-60Hz or a car’s DC 12V, and the built-in battery gives you 2-3 hours of cordless operation (usually enough for a conference session or a road trip). Operating temp is -30 to +55°C, so it handles hot trunks and cold service vehicles fine, but don’t expect it to work well near gas station pumps or hospital MRI suites—different shielding issues.

We do OEM branding at 50 units minimum—your logo printed, no mold fees, roughly 20-25 working days for the first batch after art approval. Warranty is two years included, and we’ll send a COA with HPLC purity data for teh internal components if you ask.

Payment terms are typically 30% deposit, 70% before shipment for first orders; T/T or L/C at sight works. Shippng weight is about 1.0kg per unit, dimnesions 215x215x75mm, we usually ship via DHL or FedEx for small lots—10-14 days door-to-door to most major cities.

Also, the cooling fan kicks in automatically under heavy load—you’ll hear it after about 15 minutes of continuous use, nothing unusual, but good to know if you’re setting it in a quiet room.