Ray
The Chargerless Ray is a $219 sensor band, on preorder for 2026. Seven-gram screenless health band that tracks sleep, heart rate, temperature and activity while a solar cell promises continuous use from one minute of outdoor light per day; the first two batches sold out and batch three ships from December 2026 through January 2027.
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Generations
| Generation | Year | Status | Price | Weight |
|---|---|---|---|---|
| Ray | 2026 | Preorder | $219 | 7 g |
Specifications by generation
Ray
2026PreorderSeven-gram screenless health band that tracks sleep, heart rate, temperature and activity while a solar cell promises continuous use from one minute of outdoor light per day; the first two batches sold out and batch three ships from December 2026 through January 2027.
- Category
- Band
- Worn
- Wrist
- Release
- 2026
- Price
- $219
- Weight
- 7 g
- Sensors & hardware
- Biometric
- Motion
- Power
Developer access
- SDK / APINot verified
The reviewed public product material does not establish developer access. Unknown does not mean unavailable.
Not yet verified: documentation, app distribution, vendor-server requirements and hardware and software openness.
Openness, servers & distribution
- hardware
Schematics, mechanical designs and firmware publication were not verified.
- firmware
Source availability and licensing were not established in this review.
- companion apps
Source availability and licensing were not established in this review.
- SDK
Source availability and licensing were not established in this review.
- backend services
Source availability and licensing were not established in this review.
- Vendor servers
Vendor-server requirements were not established for this device.
- App distribution
Third-party app distribution was not verified.
A companion app or integration is not evidence of a third-party app store.
Company & funding
Chargerless
Company
Legal entity and parent/brand relationships were not established in this review.
Not yet verified: disclosed funding, valuation, round count, financing and ownership, round history and named investors. A missing record does not imply zero funding.
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Independent index — figures are approximate and editorial, not official spec sheets. Methodology. Last reviewed 2026-10-31.