ESP32-S3 · IMU · 450mAh · SwapCore™
A sports wristband built on open hardware. Scroll to disassemble it layer by layer — ESP32, IMU, battery, shell and all.
01 / 07
Open hardware sports wristband. Swappable bands. Real data.
London · open hardware
02 / 07
Frosted PC with USB-C cutout, dual LEDs, two buttons.
· IP52 · 44 × 48 × 9 mm
03 / 07
240MHz dual-core. BLE 5.0 + Wi-Fi. OTA updates over the air.
· 240 MHz · BLE 5.0 · 512 KB SRAM
04 / 07
7-day life. USB-C fast charge. 90 min to full.
· 3.7 V · TP4056 CC/CV · 350 mA charge
05 / 07
Press the housing onto any band. It clicks in. 4 gold spring-pin contacts lock power and data the moment it seats.
· 4-pin · spring-loaded · hot-swap in 3 s
06 / 07
Medical-grade silicone. SwapCore receiver built in. Swap to leather, nylon or titanium — same click.
· SwapCore™ compatible · hypoallergenic
07 / 07
All specs published. Hardware files open. Built to be understood — not just worn.
· open hardware · made in London
Dual-core 240MHz processor. Wi-Fi + BLE 5.0. OTA firmware updates.
6-axis motion tracking. 16-bit precision. 1kHz sample rate.
7-day battery life. USB-C charging. 90-min full charge.
Magnetic quick-release band system. Hot-swap in under 3 seconds.
Full schematics and KiCad files on GitHub. Hack it, fork it, make it yours.
Stream data at 50Hz to your phone. Heart rate, steps, sleep, strain.
Early access pricing. Ships Q3 2025.