Lightwave’s biometric wristbands have been used at events hosted by Pepsi and Google, where DJs used the real-time data to adjust music selection to affect the crowd’s energy. The wristbands have four sensors: an accelerometer to measure the wearer’s movement, both within a space and individually (for example to track whether people are dancing); a microphone to detect decibel levels; a gauge to measure both body and ambient room temperature; and a sensor to detect skin conductance response, which can sense sweat and can indicate physiological and psychological arousal.