
Guide TE421 – the perfect choice for thermal observation
The GUIDE TE421 thermal monocular is compact and ultra-light, weighing only 295 grams, making it the ideal companion for both adventurous nature lovers and professional users. Featuring a high-sensitivity 400 × 300 @ 12 μm infrared sensor, it delivers clear and detailed thermal images in challenging conditions such as darkness, fog, or rain. With fast charging technology, just a 10-minute charge provides up to one hour of continuous use—perfect for fieldwork and unexpected situations. Whether you’re tracking animals, exploring large areas, or conducting nighttime observations, the TE421 offers reliability, accuracy, and ease of use in one compact device, delivering excellent value for money.
Powerful 12μm detector
To achieve a crisp image clarity, the TE Series is equipped with a powerful 12μm detector and offers multiple resolutions and lenses to meet your needs in various scenarios and activities.


Ultimate lightweight
The TE421 is an exceptionally lightweight and easily portable monocular, weighing only 295 grams – making it the perfect companion for long hikes as well as everyday nature observation. Its well-thought-out ergonomic design ensures a secure and comfortable grip, allowing for extended use without fatigue. Thanks to its compact size, the TE421 easily fits into your pocket or gear, always ready for quick use in any situation.
Large touch screen
The TE421 monocular is equipped with a large, high-quality touchscreen that ensures a clear and detailed image, making the device particularly user-friendly. Thanks to its intuitive touchscreen controls, users can easily navigate through menus and select desired functions with just a simple touch. This provides a smooth and user-friendly experience in any situation.


Easy to use
Based on years of outdoor experience, the TE Series has streamlined the button design to simplify operations. With a one-button and one-ring design, you can easily access the menu and perform various functions, allowing for seamless control.
Extended battery 20W quick charge
The TE421 monocular offers up to 6 hours of operating time, allowing for extended nature exploration without frequent recharging. Even more impressive is its 20W fast-charging capability – just a 1-minute charge provides up to one hour of additional use. This means that even an unexpected battery drain is no longer a problem – the TE421 is ready to go again in an instant, exactly when you need it most.


Video recording with audio
The TE421 not only allows real-time observation of your surroundings but also enables you to capture key moments through photos, videos, and audio recordings. With its built-in 16 GB memory, you have plenty of space to store all your memorable experiences – whether it’s spotting a rare bird, tracking animal movements in nature, or recording another special event. The saved content can be easily reviewed, archived, or shared with friends, making the TE421 an excellent tool for documenting nature observations and preserving unforgettable moments.
Dual-band WiFi connection
The WiFi function has been upgraded to dual-band, providing stronger connectivity. The TE Series features faster transmission speeds and longer distances, with upgrade packages downloading in just 10 seconds and a maximum transmission distance of 26.5 meters.
