A wearable wristband with a removable device comprises an electronic capsule and a wristband, wherein the electronic capsule comprises a wrist biosensor, a finger biosensor, a watertight casing, a battery, one or more circuit boards electronically coupled to the wrist biosensor and a finger biosensor. The wristband comprises a flexible material notched with a cavity and an aperture, wherein the cavity is shaped to receive the electronic capsule and the aperture shaped to receive the finger biosensor.
