ATN OTS 4T 640 2.5-25x

• 640x480 thermal sensor: The higher-resolution sensor gives the ATN OTS 4T 640 2.5-25x more image detail for identifying animals, people, and heat sources at longer distances, which matters when scanning large areas or checking targets before moving closer.
• 2.5-25x viewing range: The wide magnification span lets the monocular work both for broad-area observation at the base setting and for closer inspection at higher zoom, so one device covers scanning, spotting, and confirmation.
• 1950 m detection range: Long detection capability helps pick up heat signatures well before they are close, which is useful for hunting, property surveillance, and search tasks where early awareness matters.
• Smart HD recording and WiFi: Built-in video recording and WiFi streaming make it easier to document observations, review what was seen, or share the live view with a partner without adding external accessories.
• 16-hour Li-ion battery life: Extended runtime reduces the need for power management during long evenings in the field, making the monocular more practical for patrol, recovery, and prolonged observation sessions.

About the ATN OTS 4T Series

The ATN OTS 4T series is a family of handheld thermal monoculars in ATN’s Obsidian 4T line, built for users who need a compact observation device rather than a weapon-mounted optic. The range is aimed at spotting, hunting, stalking, game recovery, and search-and-rescue, where thermal imaging is used to detect heat signatures quickly and work in darkness, brush, or visually cluttered terrain. Across the series, ATN offers both 384 × 288 and 640 × 480 Gen 4 thermal sensor options, allowing users to choose between a more accessible setup and higher image detail.

Shared features in the series include Wi-Fi video streaming, onboard video recording, a Smart Range Finder, and an HD 1280 × 720 microdisplay. ATN also builds the OTS 4T family around its Obsidian IV Dual Core T processor, which supports the digital functions that distinguish these monoculars from simpler thermal viewers. Different models in the line pair these electronics with different magnification ranges, so the series covers both wider-field scanning and more reach-oriented observation. The overall design philosophy is practical: a handheld thermal monocular with enough digital capability to support field use, but still compact enough to carry for long periods.

About the ATN OTS 4T 640 2.5-25x

The ATN OTS 4T 640 2.5-25x is the higher-detail, longer-reach configuration in the series, combining a 640x480 thermal sensor with a 2.5-25x magnification range. In practical use, that means it can serve as both a scanning monocular and a tool for checking distant heat signatures more closely. The base magnification is useful when covering ground and maintaining situational awareness, while the upper end helps when the task shifts from detection to closer visual assessment.

The unit uses a 1280x720 Micro-HD display, which gives the thermal image a clear viewing surface for prolonged observation, and the 60 Hz refresh rate helps motion appear smoother when tracking moving animals or people. With a stated detection range of 1950 m, this model is suited to open terrain, field edges, and surveillance tasks where early detection is more important than immediate engagement. Built-in video recording at 1280x960 adds value for documenting sightings, reviewing activity, or sharing footage after the session.

ATN also gives this monocular the practical digital features expected in a Smart HD thermal device, including WiFi connectivity and a rechargeable Li-ion power system with 16 h battery life. The 235.00 mm body and 875.00 g weight keep it portable enough for handheld use, while waterproof and fogproof construction supports use in damp, cold, or changeable weather. For users who need a thermal monocular for observation rather than aiming, this model balances image detail, runtime, and digital functionality well.

About ATN

ATN was founded in 1995 in Silicon Valley, California, and the company is now headquartered in Doral, Florida. It focuses on night-vision, thermal-imaging, and digital day-and-night optics, with a product range that covers traditional image-intensifier systems as well as newer digital and thermal platforms. That mix is important in this category because it shows ATN’s long involvement in observation and aiming devices built for low-light and no-light use.

ATN is particularly known for bringing digital features into field optics, including 4K-resolution Smart HD systems and the Obsidian 4 Dual Core platform introduced in 2018. The company also introduced the X-Sight II HD series in 2015, helping establish its reputation for combining imaging hardware with onboard recording, wireless connectivity, and app-based functions. In thermal and night-vision products, ATN’s identity is closely tied to feature-rich electronic optics designed for hunting, observation, and outdoor use.

Main Features

• Series: ATN OTS 4T
• Magnification: 2.50 x - 25.00 x
• Field of view: 218.00 m/1000m
• Field of view (degrees): 12.50 °
• Detection range: 1950.00 m
• Thermal sensor resolution: 640x480
• Thermal sensor pixel count: 0.31 MP
• Refresh rate: 60.00 Hz
• Display type: Micro - HD
• Display resolution: 1280x720
• Video recording: Yes
• Video resolution: 1280x960
• Video output: Yes
• Connectivity: Wifi
• Built-in rangefinder: No
• Eye relief: 25.00 mm
• Battery life: 16.00 h
• Power supply: Li-ion
• Dimensions: 235.00 mm x 80.00 mm x 75.00 mm
• Weight: 875.00 g
• Color: Black
• Waterproof: Yes
• Fogproof: Yes

Warranty

ATN provides a 3-year warranty for this thermal monocular.

In the Box

• Lens tissue
• USB-C cable
• Soft carrying case