36-hour battery
Active-noise-cancelling on. 15-minute fast charge tops you up for a workday.
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Smartwatch lineup
Pick by use case — daily / sport / pro.
| Feature | S2 Daily | Best value S2 Sport Most popular | S2 Pro Pro athletes |
|---|---|---|---|
| Display | 1.4" AMOLED | 1.4" AMOLED | 1.6" Sapphire |
| Battery life | 7 days | 5 days | 10 days |
| GPS | ✓ | ✓ | ✓ |
| ECG | ✓ | ✓ | ✓ |
| Blood oxygen | — | ✓ | ✓ |
| Water resistance | 50m | 100m | 100m |
| Cellular | — | — | ✓ |
| Shop S2 | Shop Sport | Shop Pro |
Engineered for daily use
What goes into every Circuit Lab product, before it ships.
IP54 sealed
Sweatproof, dust-resistant, drop-tested to 1.5 m. Aluminium chassis.
Multi-point pairing
Two devices at once. Switches automatically between phone and laptop.
2-year warranty
Free firmware updates every quarter. Free battery replacement at year five.
Build & materials
Aerospace-grade aluminium
Taiwan
6063-T6 aluminium, anodised matte finish. CNC-milled to ±0.05 mm.
Recycled PCR plastic
85% post-consumer recycled. GRS certified.
Silicone soft-touch
Hypoallergenic, sweat-resistant, hand-washable.
Sapphire-coated glass
9H hardness, scratch-resistant up to 8H steel.
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