Kalsten | SlimFit Ultimate Smartwatch – Ultra-thin, Health Monitoring & AMOLED Display
Meet the SlimFit Ultimate Smartwatch
Experience the thinnest smartwatch of the moment – only 7.9 mm thick – so light that you'll forget you're wearing it!
Extensive compatibility
Works with iPhone, Samsung, Huawei, Nokia, Xiaomi and more. Includes charger and English manual.
Advanced features for daily use
- Always connected: Answer calls, read messages, and receive notifications from WhatsApp, Facebook, and Instagram.
- Complete health insights: Measure heart rate, blood pressure, oxygen, stress, blood sugar, and calories.
- Custom sport tracking: Multiple sport modes for walking, running, cycling, yoga, and more.
- Always-on display: Direct view of time and updates without moving your wrist.
- Sleep tracking: Insights into your sleep quality for better rest.
- Track daily activities: Step and calorie counters for targeted goals.
- Premium display: AMOLED screen with vivid colors and crystal-clear image.
- Comfortable design: Ultra-thin (7.9 mm) and elegant – suitable for sports and formal occasions.
- Skin-friendly: Completely nickel-free and hypoallergenic, suitable for sensitive skin.
Make it personal
Customize your watch face with countless designs – from classic to modern. Always a style that fits your day.
- Long battery life: Up to 7 days of use and 10 days of standby on a single charge.
- IP67 waterproof: Resistant to rain and sweat – perfect for an active lifestyle.
- Extra convenience: Includes weather updates, stopwatch, alarm, music control, hydration reminders, and built-in flashlight.
The SlimFit Ultimate Smartwatch is your daily partner – stylish, smart, and functional. For those who don’t want to compromise between design and technology.
Free standard shipping on all orders. No minimum purchase.
- Ships to: United States
- Processing: 1–4 business days (Mon–Fri)
- Transit: 5–10 business days
- Total delivery time: 6–14 business days
- Order cut-off: 5:00 PM PST
You will receive a tracking number by email once your order ships. Please allow up to 48 hours for tracking to update.
See our full Shipping Policy.
You have 14 days from delivery to request a return.
- Email support@open.shop with your order number to start a return.
- Items must be unused, complete, and in their original packaging.
- Return label: flat $9.99 USD, deducted from your refund — nothing to pay upfront.
- Damaged, defective or incorrect items: we cover all return and replacement costs.
- No restocking fees.
- Exchanges: contact us and mention "exchange" — the new item ships once your return arrives.
- Refunds are issued within 7 business days of inspection.
See our full Return Policy.
Questions about your order or our products? We're happy to help.
Open
Hooizolder 214
Drachten Friesland 9205CD
Netherlands
Email: support@open.shop
Customer Service:
Monday to Friday, 8:00 AM – 6:00 PM PST (excluding public holidays)
We reply to all messages within 24 hours on business days. Weekend messages are answered on Monday.
For quick answers, visit our FAQ page or use our Contact Form.
