| Item | Where to Buy | Unit Price |
|---|---|---|
| Seeed Studio XIAO nRF52840 Sense Board | - $15 Seeed Studio - $24Amazon US - Amazon EU - Robu.in India | $15/unit |
| Rechargeable Battery | - $7 on Amazon US | $7/unit |
| Slider Switch | - $8 for 30+ units on Amazon US - Amazon EU - Amazon UK (Model: SS12D00-G3, 3mm) (Only one switch is needed) | $1/unit |
| Wires | - Various options on Amazon US | Varies |
| Case | - 3D-print design available on GitHub | Varies |
Notes:
- The provided links are third-party providers; we do not guarantee product availability or quality.
- Pricing is approximate and may vary depending on your location and shipping fees.