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YESIDO IO39 Smart watch
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Display: 2.01-inch HD full touchscreen with a 240 × 296 screen resolution.
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Build: Premium zinc-alloy case with a comfortable TPU strap. The retail box typically includes two different watch strap types for customization.
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Connectivity: Bluetooth 5.1 / 5.2 for stable phone syncing.
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Battery & Charging: 180mAh to 260mAh capacity (varies slightly by regional version) featuring magnetic wireless charging that fills up in about 4 hours.
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Bluetooth Calling & Communication: Includes a built-in speaker and microphone, allowing you to dial and answer calls directly from your wrist. It syncs your phone's contacts, records call logs, and features customizable SOS emergency calling.
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Smart Notifications: Displays instant alerts and messages from your phone for SMS, WhatsApp, Facebook, WeChat, Twitter, and other apps.
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Health Tracking: Equipped with sensors to measure real-time heart rate, blood pressure, and blood oxygen levels (SpO₂). It also features comprehensive sleep tracking (monitoring REM, deep, and light sleep phases).
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Fitness & Activity Monitoring: Tracks daily steps via a built-in pedometer, counts active calories burned, and supports multiple distinct workout tracking modes.
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Daily Utilities: Built-in tools include an on-wrist calculator, calendar, customizable alarm, stopwatch, remote camera control, music playback controls, weather updates, and sedentary/water reminders.
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Voice Assistant: Supports a press-and-hold shortcut to activate your smartphone's voice assistant (such as Siri) via remote control.
YESIDO IO39 Smart watch