Frequently Asked Questions

Ray tracks heart rate, heart rate variability (HRV), sleep stages, body temperature, steps, and light exposure. All data syncs to our companion app where you can view trends and insights.

Yes, the Ray is fully waterproof and can be worn while swimming, showering, spelunking, running, water poloing, or in any weather conditions.

Pretty much. The Ray charges itself with light, indoors and out — one minute of sunlight a day is enough to run forever. Even in total darkness, it lasts two months on a full charge.

Absolutely, preorders are fully refundable at any time before shipping, no questions asked. Just email us at hello@chargerless.xyz.

Our first batch is expected to ship in Fall 2026, and we'll send updates as we get closer to the ship date.