Rainbuvvy Co., Ltd.
| Screen type | AMOLED HD screen |
| waterproof | IP68 |
| Battery capacity | 400mAh |
| Payment Terms | L/C, D/A, D/P, T/T, Western Union, MoneyGram |
| Supply Ability | 100pcs per 5 days |
| Delivery Time | 5-8 work days |
| Packaging Details | 12cm*8cm*5cm |
| TP | Glass (Panda Substrate) |
| IOS OS | IOS 13.0 or later |
| Screen size | 1.43 |
| Color | silver |
| Brand Name | Rainbuvvy |
| Model Number | S666 (new) |
| Certification | CE,FCC |
| Place of Origin | China |
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Product Specification
| Screen type | AMOLED HD screen | waterproof | IP68 |
| Battery capacity | 400mAh | Payment Terms | L/C, D/A, D/P, T/T, Western Union, MoneyGram |
| Supply Ability | 100pcs per 5 days | Delivery Time | 5-8 work days |
| Packaging Details | 12cm*8cm*5cm | TP | Glass (Panda Substrate) |
| IOS OS | IOS 13.0 or later | Screen size | 1.43 |
| Color | silver | Brand Name | Rainbuvvy |
| Model Number | S666 (new) | Certification | CE,FCC |
| Place of Origin | China | ||
| High Light | GPS sport smartwatch with iOS Android ，fitness smartwatch with GPS tracking ，sport smartwatch compatible with iOS | ||
The S666 features a 1.43" AMOLED HD screen with 466 × 466 resolution, delivering sharp text, vivid colors, and deep blacks. The always-on mode lets you check the time without lifting your wrist, while the raise-to-wake gesture lights the screen the moment you need it. Adjustable brightness and a range of customizable watch faces let you match your style — from classic analog to bold digital.
Built with a CNC aluminum alloy middle frame and lightweight ABS construction, the S666 weighs just 28 g — comfortable enough for all-day wear, workouts, and sleep. The soft silicone strap (260 mm) fits snugly and comfortably, and the IP68 rating means the watch shrugs off sweat, rain, and splashes. A photoelectric knob encoder and two physical buttons make navigation fast and intuitive, even with wet hands.
Whether you're running, cycling, hiking, or hitting the gym, the S666's high-accuracy GPS delivers precise distance and pace data and records your movement track so you can review your routes. A wide range of multi-sport modes automatically adapts to your activity, helping you stay motivated and measure real progress.
The S666 is more than a timepiece — it's a wellness companion. Monitor your heart rate and blood oxygen (SpO2) levels throughout the day, track sleep quality and stages, and keep tabs on stress with guided breathing training. The built-in female menstrual cycle tracking helps you stay informed and prepared. All health data syncs seamlessly to the Fitbeing app for easy review and insights.
Answer calls, check messages, and never miss important notifications again — all from your wrist. The Bluetooth calling feature delivers clear, stable audio with a connection range of 20 m+, so your phone can stay in your bag. Remote music control, remote camera shutter, real-time weather, find-my-phone, alarms, timers, a stopwatch, and do-not-disturb mode round out a truly smart daily companion. A built-in compass and barometer add extra utility for outdoor adventures.
A 400 mAh lithium polymer battery keeps the S666 running up to 15 days on light use and 10 days under typical use — and even 4 days with the always-on display enabled. When it's time to recharge, the magnetic charger tops it up in about 2 hours.
The S666 is compatible with Android 9.0 and above and iOS 13.0 or later, and pairs easily via Bluetooth 5.3 (BLE). The Fitbeing app supports English, German, Japanese, French, Italian, Spanish, Russian, Portuguese, and Chinese, with user manuals available in Chinese and English.
Company Details
Business Type:
Manufacturer,Distributor/Wholesaler,Exporter
Year Established:
2014
Total Annual:
10 Million-20 Million
Employee Number:
101~200
Ecer Certification：
Verified Supplier
Rainbuvvy is a vertically integrated smartwatch innovator based in China, operating both as the manufacturer behind global wearable brands and the creator of our own international smartwatch brand Rainbuvvy. With a dedicated team of 45+ engineers and industry specialists, we deliver OEM/ODM solution... Rainbuvvy is a vertically integrated smartwatch innovator based in China, operating both as the manufacturer behind global wearable brands and the creator of our own international smartwatch brand Rainbuvvy. With a dedicated team of 45+ engineers and industry specialists, we deliver OEM/ODM solution...
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