Sig Sauer Soec22100 Echo Thermal Black 1-8X 25Mm

The Sig Sauer Echo thermal clip-on is a compact 1-8x25mm thermal optic built for hunters and tactical shooters who want to layer thermal capability onto an existing riflescope or red dot without replacing it entirely. At just under 5 inches long and weighing less than 19 ounces, it mounts via quick-detach and can pull double duty as a standalone thermal sight when needed. The 640x512 LWIR thermal core delivers clean image quality across changing light and weather, with thermal sensitivity down to 20 millidegrees—sharp enough to spot game and threats in complete darkness.

What sets the Echo apart is its practical runtime and configurability. A pair of rechargeable 18650 batteries keeps it running for over 9 hours per charge, and you can manage settings, stream live video, and adjust thermal palettes through the BDX app. The 1024x768 AMOLED microdisplay is optimized for clip-on use, minimizing parallax issues you'd encounter with less refined thermal clips. Record still photos and video with audio built in—useful for documenting hunts, verifying game at distance, or training footage on the range.

It's sealed to IP67, so rain, dust, and field use won't compromise the electronics. The package ships with an EVA case, protective bikini cover, both batteries, and a USB-C cable, so you're ready to hunt the same day it arrives. Backed by Sig Sauer's Infinite Guarantee, this is thermal glass built to last.

Key Features

• Compact 5-inch clip-on design mounts to existing optics or stands alone as a thermal sight
• 1-8x magnification with 17.6° field of view for both close-range and mid-distance work
• 640x512 12-micron LWIR core with ≤20mK thermal sensitivity for clear low-light and night imaging
• 9+ hour runtime on rechargeable 18650 batteries, includes two batteries and USB-C charger
• BDX app integration for live streaming, configuration, and thermal palette selection
• Still photo and video recording with audio for documentation and training
• IP67 waterproof rating handles field conditions
• 1024x768 AMOLED display optimized for clip-on parallax-free operation
• Includes EVA case and protective bikini cover
• SIG SAUER Infinite Guarantee unlimited lifetime warranty

Specifications

Frequently Asked Questions

Can I use the Echo as a standalone thermal sight, or is it only a clip-on?

The Echo is designed primarily as a clip-on to layer onto an existing optic, but its eyepiece is optimized for parallax-free stand-alone use as well. You can remove it from the quick-detach mount and run it as a dedicated thermal sight if you prefer.

What's included in the box?

The package includes the Echo thermal clip-on, two 18650 rechargeable lithium-ion batteries, a USB-C charging cable, an EVA protective case, and a bikini cover.

How long does the battery last on a single charge?

A fully charged 18650 battery provides over 9 hours of runtime. Two batteries are included, and both are rechargeable via the included USB-C cable.

Can I stream video live from the Echo to my phone?

Yes. The Echo is BDX-enabled and can be configured through the SIG SAUER BDX app, which includes live video streaming capability as well as access to thermal palettes and other settings.