ItemWhere to BuyUnit 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 USVaries
Case- 3D-print design available on GitHubVaries

Notes:

  1. The provided links are third-party providers; we do not guarantee product availability or quality.
  2. Pricing is approximate and may vary depending on your location and shipping fees.