In this paper, we present a component which is able to transmit the signal of accelerometer over Bluetooth to a smartphone for head motion analysis. The proposed component is composed of a Bluetooth module and an accelerometer. The component is connected to smart phone with Bluetooth connection. We analyzed vertical and horizontal motions for a headset based on the acceleration. We tried to find proper parameters of accelerometer for head motion analysis. We expect that this result will be helpful when we implement motion-based headset.