D21 Manuals & User Guides

User manuals, setup guides, troubleshooting help, and repair information for D21 products.

Tip: include the full model number printed on your D21 label for the best match.

D21 manuals

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

Bluetooth Heart Rate Wristband D21 Instruction Manual – HPlus Watch

February 17, 2021

D21 Bluetooth Heart Rate Wristband Instruction Product Specification Chip model: nRF51822 nRF51822( Cortex M0 16MHz) Memory: 256K Acceleration sensor: Three-axis acceleration sensor Heart rate sensor: Green light static heart rate sensor Display: OLED 0.66’’ 64x48 Dots Motor: Cylindrical vibration motor Key-press: Touch key Battery: 80mAh Notice: The wristband…

Brand: Skmei