Yellow. The MINDER Hi-Vis Wrist Personal alarm features a 130dB alarm siren with button activation and is finished in a bright yellow ABS plastic with reflective Hi-Vis wrist straps to ensure high visibility. It is perfect for runners, cyclists, walkers and individuals involved in active pursuits during darker hours. It has an easy to use Velcro strap making it adjustable for different wrist sizes and is supplied with batteries included.. High visibility wrist strap. Finished in a bright yellow ABS plastic. 130dB alarm siren. Easy to use Velcro strap