Clean the display, work in a dust-free environment, place the protector from one edge, and push out air bubbles with a card.

Bubble-free installation is straightforward with the right preparation:

• Cleaning: First wipe the display dry with the included microfibre cloth, then degrease it with the wet cleaning wipe. Remove all fingerprint residue and dust completely.
• Dust-free environment: Best done in a bathroom – steam binds airborne dust particles. Avoid direct sunlight during installation.
• Position the protector: Carefully align the film adhesive-side down over the display without touching the adhesive layer.
• Apply: Starting from one short edge, slowly lay the film onto the display. Immediately push air bubbles toward the opposite edge using the included card or your finger.
• Touch-up: Small remaining bubbles in AirGlass products often disappear within 24–48 hours as the flexible adhesive layer outgasses.

Yes, all compatible screen protectors are water-repellent and can be wiped with a damp cloth – the adhesive layer is not affected by moisture.

The Bosch Kiox 400C is designed as an e-bike display for all weather conditions, and the recommended screen protectors are matched accordingly:

• Water-repellent surface: The oleophobic anti-fingerprint coating on glass protectors (AirGlass) repels not only grease and fingerprints but also water droplets. Rain beads off and leaves minimal streaks.
• Everyday cleaning: A slightly damp microfibre cloth is sufficient. Avoid solvents, alcohol, or abrasive cleaners – these can damage the coating over time.
• Adhesive layer: The silicone-based adhesive is moisture-resistant; brief rides in rain or splashed water do not affect adhesion.
• Touch in wet conditions: Light moisture on the surface can temporarily reduce touch sensitivity – this is a characteristic of the capacitive touchscreen itself, not the protector.

Flexible glass protectors are the better fit for the Kiox 400C: 9H scratch hardness, low weight, and no impact on touch sensitivity.

Both material types have specific strengths that are relevant depending on the use case:

• Glass protectors (e.g. AirGlass): Offer a hardness of 9H, effectively preventing scratches from sand, dirt, and tools. Flexible glass protectors like AirGlass are thinner than conventional tempered glass and fully retain touch sensitivity. Ideal for intensive outdoor use.
• Plastic films (PET/TPU): Are lighter but only reach hardness levels of around 3H–4H. Their elasticity absorbs minor impacts better, but they provide less reliable protection against scratches from dirt particles.

Since the Bosch Kiox 400C is exposed to weather, dust, and occasional finger pressure as an e-bike display, a flexible glass protector offers the best balance of protection, touch quality, and minimal added thickness.

Yes, matte anti-glare protectors are particularly useful for the Kiox 400C: they reduce glare in sunlight and improve readability outdoors.

The Bosch Kiox 400C is primarily used outdoors, where direct sunlight can cause strong reflections on the display. A matte anti-glare screen protector (e.g. BROTECT AirGlass Matte or BROTECT Anti-Glare Film) addresses this with a microstructured surface that diffuses incoming light instead of reflecting it.

• Anti-glare effect: Blinding reflections in sunlight are significantly reduced, noticeably improving the readability of navigation data and speed readings.
• Anti-fingerprint: The matte surface shows fingerprints less visibly than glossy protectors.
• Minor sharpness reduction: Matte films can slightly reduce screen sharpness – for numbers and icons on an e-bike display, this is not a practical issue.

Anyone who frequently uses the Kiox 400C in bright daylight or direct sunlight will benefit considerably from a matte variant.

The BROTECT AirGlass screen protector (SKU 2759312) is the top pick – ultra-thin, 9H hardness, and with an oleophobic anti-fingerprint coating.

For the Bosch Kiox 400C, the BROTECT AirGlass glass screen protector is the best choice. It combines the scratch resistance of tempered glass (9H hardness) with a flexibility far beyond standard glass protectors – thanks to the exclusive AirGlass technology, it is roughly twice as thin and light as conventional tempered glass.

• 9H hardness: Reliably protects the display against tool scratches and dirt particles common in everyday cycling.
• Oleophobic coating: Fingerprints and sweat marks wipe off easily without damaging the surface.
• Ultra-thin material: The Kiox 400C's touch sensitivity is fully preserved.
• Bubble-free adhesive: Allows precise installation without air pockets.

Clean the screen, align the film, then press it down slowly from the center outward to push air out.

For a clean, bubble-free application of upsceen Scratch Shield Schutzfolien:

• Wash your hands and work in a low-dust area
• Clean the surface thoroughly with a microfiber cloth
• Align the film, start at one edge, and lower it slowly
• Push air out from the center to the edges using a card or your finger

Small bubbles often disappear after a short time once the film has fully settled.

For drop impact protection, tempered glass is often stronger; for flexible fit and everyday scratch protection, a film like upsceen Scratch Shield Schutzfolien makes sense.

As a simple material overview:

• Tempered glass: more rigid, can cushion impacts better
• Film: thin and flexible, strong for everyday scratch protection and usually easier to conform
• Privacy: adds side-view blocking

upscreen Scratch Shield Schutzfolien belongs to the film category: flexible, practical, and focused on scratch protection.

upscreen Scratch Shield Schutzfolien are flexible screen protectors designed to reduce everyday scratches and make the surface easier to clean.

upscreen Scratch Shield Schutzfolien use a flexible film with a hard-coated surface. This helps protect the display from fine scratches in daily use while keeping touch response natural.

• Flexible and slim – adapts well
• Glossy, transparent finish
• Anti-fingerprint surface for easier cleaning

If your main goal is scratch protection in everyday use, upscreen Scratch Shield Schutzfolien is a solid option.

Usually not—touch remains normal when the film is applied cleanly and smoothly.

With a proper application, touch response typically stays the same. The key is avoiding dust and trapped air bubbles underneath.

• Clean the surface thoroughly first
• Align the film slowly and press it down
• Push bubbles out from the center to the edges

The anti-fingerprint surface also helps keep the screen easier to wipe clean.

Yes, we ship worldwide. Shipping is even free to many European countries like the UK, France, and Italy.

If you are ordering to a country not on our free shipping list, the specific shipping costs will be shown transparently in the shopping cart.