K409 Handheld Jammer (20 meters)



K409 is able to block the following frequencies:

  1. Full band mobile phone signals 2G/3G/4G/5G

  2. WiFi 2.4/5GHz

  3. GPS L1 - L5
  4. Lojack
  5. Remote control 433/315/868
Output Power: Total 12W,0.7W each band
Range: Upto 20 meters
Power Supply: AC110-240V to DC12V
Cooling System:
Aluminum alloy radiator, Build-in 3 cooling fan
Battery: 7.4V/12000mAh
Battery Life: 120 minutes
Product Size:
280x130x46 mm (without Antenna)
Product Weight: 2.0 Kg
Package Includes:
Device x 1, AC Charger x1, omni antenna x16, Car Charger x1,


Antenna Information

Specifications for Each Channels

The specifications provided for each channel are based on the item for the USA as a reference. As different countries operate on varying frequency ranges, we will fine-tune the frequency range according to your country before shipping to ensure the effectiveness of our products.


Channel Output Port Frequency Range
Output power
1 VHF&LOJACK 135-175MHz
28.5dbm / 0.7W
2 4G 700 700 – 803MHz
28.5dbm / 0.7W
3 5G 600 617 – 685MHz
28.5dbm / 0.7W
4 3G 2110 – 2170MHz
28.5dbm / 0.7W
5 WIFI 5.2G 5125 – 5350MHz
28.5dbm / 0.7W
6 4G 1700 1710-1780MHz
28.5dbm / 0.7W
7 CDMA 850-894MHz
28.5dbm / 0.7W
8 4G 2600 2500 – 2690MHz
28.5dbm / 0.7W
9 RC 315 315MHz
28.5dbm / 0.7W
10 RC 433 433MHz
28.5dbm / 0.7W
11 5G 3600 3600 – 3900MHz
28.5dbm / 0.7W
12 5G 3400 3400 – 3600MHz
28.5dbm / 0.7W
13 GPSL1 1570 – 1580MHz
28.5dbm / 0.7W
14 WIFI 2.4G / 4G 2300 2345 – 2500MHz
28.5dbm / 0.7W
15 PCS 1920 – 1990MHz
28.5dbm / 0.7W
16 WIFI 5.8G 5725 – 5850MHz
28.5dbm / 0.7W

Hidden Antenna


20 meters



Output Power


Turnaround Time

Please noted that all our products are made to order. Once your order is confirmed, it takes us about 5 business days to produce your item. During this time, we rigorously test everything to make sure it works perfectly in your country. After the testing phase, we hand it off to the fastest courier service available, which usually gets your order to you in 5 to 7 days. So, you can expect to receive your order within 10 to 12 days after confirmation


Can you ship your products to my country?

Absolutely! We use international shipping, so no matter where you are on the planet, we've got you covered.

Which courier do you use?

We primarily use DHL. If DHL doesn't serve your area, we'll switch to UPS or FedEx.

How can I track my package?

You'll get an email with your DHL tracking ID around the sixth day after order confirmation. You can use this ID to track your package on the DHL website.

Is the packaging discreet?

Yes, it is. The outer packaging will be labeled as containing other electronic products.

Where do the products ship from?

All orders are shipped from Hong Kong.

I didn't receive my order.

This is rare, but if it happens, just reach out to our customer service team and we'll sort it out for you.