This model is an upgrade vision of the WT6300 call us to find out this product here is a useful link to zebra main page of the WT6400  https://www.zebra.com/ap/en/products/mobile-computers/wearable-computers/wt6400.html

It’s fast and smart: This thing can juggle multiple tasks like a pro, making your day-to-day run smoother.
Feels like nothing: Wear it all day without that “ugh” feeling. Super comfy!
Tough cookie: Drop it, splash it, freeze it – the WT6400 keeps going.
Plays well with others: Hooks up with your current system and Zebra gadgets in a snap.
Why not boost your team’s speed and accuracy with something that’s built to last and easy to wear? Plus, it’s from Zebra, so you know it’s good stuff.

Increase workflow efficiency and workforce productivity in demanding environments with the next generation in hands-free wearable computing

The WT6400 is the latest breakthrough in Zebra’s wearable computer portfolio, packed with innovations that enable unmatched productivity increases in hands-free computing workflows. The WT6400 brings a new level of comfort, flexibility and ease of use to workers picking orders, sorting goods and managing inventory in the warehouse, distribution center and manufacturing plant. Compared to the WT6300, the touchscreen display area is over twice the size,1 with only marginal increases in overall device size and weight. The result? A very compact, lightweight and well balanced device that provides plenty of space to view and interact with the information needed to complete tasks. A model with an integrated keypad positioned under the display provides both right and left handed accessibility — and the keys are sized and spaced to enable easy manual data entry, even with heavy gloves. The side facing camera is positioned to enable workers to easily see the photo on the display before they capture the image. Pair with a Bluetooth wearable scanner or connect a corded scanner with the ruggedized interface port. The WT6400 can be used anywhere in your facility — including the freezer. The next generation future-proof platform delivers next generation processing power and support for future versions of Android. The rugged design is built to last for years. Versatile wrist straps enable a customized fit on any arm for maximum comfort. Workers can easily swap batteries without removing the device from the arm. And only-from-Zebra Mobility DNA tools simplify every aspect of device lifecycle for IT and your users. The WT6400 — the ideal wearable computer to take productivity and workflow efficiency to the next level in your operations.

When your workflows require intensive manual data input, there is a model with an integrated keypad to meet your needs. The strategic placement of the keypad below the display reduces the width by nearly one-third compared to the prior generation, creating a well-balanced and more compact device footprint that increases user comfort and reduces arm fatigue. And because of its unique placement, the keypad is always in front of the user, providing complete data entry flexibility — users can wear the WT6400 on either arm, and with equal access for left and right handed workers. And the keys are optimally sized and purposefully spaced to enable workers to quickly and easily press only the key they want — even with heavy gloves

The WT6400 increases productivity and operational efficiency for all hands-free workflows anywhere in your facility — including the freezer. All internal system components are freezer rated — application performance and processing speeds aren’t impacted by the cold. Special freezer chemistry in the extended battery enables the device to operate at temperatures as low as -22°F/-30°C — ensuring full shift power, even if workers spend the bulk of their shift in the freezer. And while freezer temperatures typically make plastics extra brittle and susceptible to shattering when dropped or bumped, the WT6400 housing plastics are specially designed to provide the same level of shatter protection inside and outside the freezer. And the special touchscreen on the WT6400 allows workers to interact with touch applications in the freezer, even with heavy gloves.