HD21 Manuals & User Guides

User manuals, setup guides, troubleshooting help, and repair information for HD21 products.

Tip: include the full model number printed on your HD21 label for the best match.

HD21 manuals

Latest posts, featured manuals, and retailer-linked manuals for this brand tag.

Amazfit HD21 Active 2 GPS Smart Watch Owner’s Manual

December 14, 2025

Amazfit HD21 Active 2 GPS Smart Watch OWNER'S MANUAL PLEASE READ THESE INSTRUCTIONS BEFORE USTHIIS PNRODG BUTTONS AND TOUCH MOBILE PHONE CLIENT DOWNLOAD Scan the QR code Above to download and install the mobilephone client WATCH CONNECTION FUNCTION INTRODUCTION …

Brand: Amazfit

Huadai HD21 Smart Watch User Manual

July 1, 2025

Huadai HD21 Smart Watch User Manual PLEASE READ THIS SPECIFICATION AND KEEP IT PROPERLY BEFORE USING THIS PRODUCT BUTTONS AND TOUCH Short press: Exercise List Long press: Voice Assistant Double click: Switch Menu Short press: Enter the Menu List Long…

Brand: Huadai

DUGGEE HD21 Smart Tablet Instruction Manual

December 26, 2021

DUGGEE HD21 Smart Tablet Let your child learn while having fun with Duggee and the Squirrels. With five activities to encourage learning about colours, numbers, shapes, letters, characters & badges. HOW TO PLAY Press START BUTTON to turn the tablet…

Brand: DUGGEE