A slim 24‑gram fitness band with a 1.4‑inch dual‑tone E‑Ink display that tracks steps, sleep, altitude and speed. Bluetooth 4.0 LE and NFC link to Android 4.4+, while the built‑in speaker, microphone and vibration motor enable calls and alerts. The IP68 rating keeps it water‑proof up to 1.5 m, and a 70 mAh battery lasts three days on normal use.