RM-225 Thermal Riflescope 256 1-4x 25mm
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The Onick RM-225 is a 256-class thermal riflescope with a 25 mm objective and 1–4x magnification, built for hunting after dark and predator control. Onick fits 32 GB of on-board photo and video, Wi-Fi streaming to a phone, and a Picatinny mount. Covered by Onick's 18-month limited warranty against manufacturing defects. Key features: • 256×192 VOx sensor, 12 μm pixel pitch • 25 mm objective, 1–4x digital zoom • 1,312 yd human detection range • 32 GB onboard photo and video, Wi-Fi streaming to a phone • Runs on two CR123A batteries, 4+ hours • IP67, Picatinny rail, 800G shock rated • 18-month Onick limited warranty
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Overview
The Onick RM-225 is a 256-class thermal riflescope with a 25 mm objective and 1–4x magnification, built for hunting after dark and predator control. Onick fits 32 GB of on-board photo and video, Wi-Fi streaming to a phone, and a Picatinny mount. Covered by Onick's 18-month limited warranty against manufacturing defects.
Key features:
• 256×192 VOx sensor, 12 μm pixel pitch
• 25 mm objective, 1–4x digital zoom
• 1,312 yd human detection range
• 32 GB onboard photo and video, Wi-Fi streaming to a phone
• Runs on two CR123A batteries, 4+ hours
• IP67, Picatinny rail, 800G shock rated
• 18-month Onick limited warranty
Questions & Answers
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Why This Product
The RM-225 Thermal Riflescope 256 1-4x 25mm is a dedicated thermal scope built for hunters who need reliable heat detection after dark. Its 256px sensor delivers clear, reliable thermal imagery in most conditions. It identifies heat signatures out to 1312 yards — enough reach for most hunting scenarios. At 17.35 oz, it's lightweight enough for all-day carry without fatigue. Backed by 18-month warranty and Thermisight's veteran-owned service team.
Expert Video Reviews
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See the RM-225 Thermal Riflescope 256 1-4x 25mm in action — hands-on reviews, field tests & comparisons
Field Footage Gallery
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Onick Support
RM-225 Thermal Riflescope 256 1-4x 25mm
Factory support, warranty service, and replacement parts for this model come directly from Onick.
Financing Calculator
- Purchase price
- $1,150
- APR
- 0%
- Down payment
- $0
- Total of payments
- $1,150
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Complete your kit
Compatible accessories for your Onick RM-225 Thermal Riflescope 256 1-4x 25mm.
Key specifications
- Detector
- 256×192
- Detection range
- 1,312 yd
- Magnification
- 1–4×
- NETD
- —
- LRF
- —
- Refresh
- 25 Hz
Specifications
- Sensor
- 256×192 VOx uncooled
- Pixel pitch
- 12μm
- Magnification
- 1-4X
- Objective
- 25mm
- Detection range
- 1,200 m / 1,312 yd (human)
- Refresh rate
- 25 Hz
- Display
- OLED 1024×768
- Storage
- 32 GB onboard photo/video
- Connectivity
- Wi-Fi 2.4 GHz streaming to phone
- Battery
- CR123A (16340) ×2
- Runtime
- ≥4 hrs
- Shock resistance
- 800G
- Mount
- Picatinny rail
- Ingress protection
- IP67
- Weight
- 492 g (17.4 oz)
- Warranty
- 18 months (Onick limited)
- Origin
- China
- Export
- Sold for U.S. end use only
Sample Thermal Images
Real thermal imaging samples captured with this camera — swipe to browse, tap any image to view full size.
Compare detection range & sensitivity
Side-by-side with similar thermal scope optics. Lower NETD = better thermal sensitivity; higher detection range = farther identification.
| Spec | |  |  |  |  |
|---|---|---|---|---|---|
| Detection range | 1,312 yd | 9,503 yd | 4,000 yd | 3,991 yd | 3,870 yd |
| Sensitivity (NETD) | — | 35 mK | 15 mK | 18 mK | 15 mK |
| Sensor res. | 256px | 256px | 384px | 640px | 640px |
| Objective | 25mm | 19mm | — | — | 50mm |
| LRF | No | No | No | No | No |
| Price | $1,150 | $764.5 | $6,595 | $2,595 | $4,394.5 |
Best-in-row values are shown in accent. Your current optic is highlighted.
Still weighing the RM-225 Thermal Riflescope 256 1-4x 25mm? Try our 60-second AI Buyer's Guide
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China- Detector
- 640×512
- Range
- —
- NETD
- —
- Flight time
- 45 min
- Zoom
- 35×
- Frame rate
- —
or $1,607/mo · 0% APR
China- Detector
- 640×512
- Range
- —
- NETD
- 50 mK
- Flight time
- 40 min
- Zoom
- —
- Frame rate
- —
or $323/mo · 0% APR
China- Detector
- 640×512
- Range
- —
- NETD
- —
- Flight time
- 42 min
- Zoom
- —
- Frame rate
- —
or $1,050/mo · 0% APR
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Care & Maintenance
Lens Care
- •Use only microfiber cloths and lens cleaning solution designed for coated optics — never paper towels or shirt sleeves.
- •Blow off dust with a bulb duster before wiping to avoid scratching the germanium lens coating.
- •Store with lens caps on when not in use to protect the objective and eyepiece.
Battery & Power
- •Remove batteries during long-term storage (>30 days) to prevent corrosion.
- •Charge to 80–90% before extended storage; avoid leaving fully discharged for long periods.
- •Use only manufacturer-approved batteries and chargers — aftermarket cells can cause thermal runaway.
Storage & Environment
- •Store in a dry, climate-controlled environment between 32°F and 77°F.
- •Avoid leaving in a hot vehicle — extreme heat degrades the thermal sensor over time.
- •Keep the optic in its case during transport to prevent impact damage to the internal sensor.
Zero & Calibration
- •Re-check your zero after any significant impact or temperature change >40°F.
- •Run the onboard NUC (non-uniformity correction) calibration before each hunting session for best image quality.
- •If your reticle drifts, contact our warranty team — don't attempt to disassemble the optic yourself.
Manuals & spec sheets
Onick does not publish this model's manual publicly — ask our team and we will send the current manual and spec sheet for the RM-225 Thermal Riflescope 256 1-4x 25mm.
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