A one-size-fits-all bracelet for measuring stress based on the Galvanic Skin Response (GSR). Thanks to the keen ergonomic design this bracelet securers good skin contact with the enclosed sensors. The housing is waterproof and the operation buttons are placed under the enclosure for a smooth design. The LED light appears through the housing and provides additional feedback to the user. The data can be transferred wirelessly or via USB, after opening the lid.