This HUD is for doing ref. desk shifts and sounds an alarm when someone arrives on the ref. desk in front of you. This means you can get on with surfing the web or doing whatever else and know that if someone arrives you will be notified with an alarm. Start the HUD by wearing it. To activate the HUD (start the HUD sensing) click on the green box (it turns red), if someone is in front of you it will sound, to stop the alarm again click on the box (it turns back to green).
To obtain a copy IM Gareth Otsuka.