Chipset: PAR2860 – ultra-low power, optimized for durability and efficiencyMemory: 512 KB ROM + 32 KB RAMG-Sensor: SC7A20H motion sensor for activity and movement trackingHeart rate sensor: Tianyi 3918 optical heart rate sensorBluetooth Version: Bluetooth 5.0 for stable and energy-efficient connectivityBattery Type: Polymer Pure Cobalt BatteryBattery Capacity: 16 mahCharging time: Approximately 1 hourCharging: Charging case / magnetic chargerOperating temperature range: 0°C to 50°C

Sizing Guide: <table style="min-width: 50px"><colgroup><col style="min-width: 25px"><col style="min-width: 25px"></colgroup><tbody><tr><th colspan="1" rowspan="1">Size</th><th colspan="1" rowspan="1">Circumference</th></tr><tr><td colspan="1" rowspan="1">Size 8</td><td colspan="1" rowspan="1">59–62 mm</td></tr><tr><td colspan="1" rowspan="1">Size 9</td><td colspan="1" rowspan="1">63–65 mm</td></tr><tr><td colspan="1" rowspan="1">Size 10</td><td colspan="1" rowspan="1">66–68 mm</td></tr><tr><td colspan="1" rowspan="1">Size 11</td><td colspan="1" rowspan="1">69–71 mm</td></tr><tr><td colspan="1" rowspan="1">Size 12</td><td colspan="1" rowspan="1">72–74 mm</td></tr><tr><td colspan="1" rowspan="1">Size 13</td><td colspan="1" rowspan="1">75–77 mm</td></tr></tbody></table>

Size	Circumference
Size 8	59–62 mm
Size 9	63–65 mm
Size 10	66–68 mm
Size 11	69–71 mm
Size 12	72–74 mm
Size 13	75–77 mm

Size	Circumference
Size 8	59–62 mm
Size 9	63–65 mm
Size 10	66–68 mm
Size 11	69–71 mm
Size 12	72–74 mm
Size 13	75–77 mm

Zeno Smart Ring (Zen-1)