Think about how long it realistically takes you to input your key code on your mobile phone and either bring up your number pad and dial, or pull up your contacts and browse for someone specific. The low-tech Hoo Whistle Case would be a heaven-sent handset accessory in instances of danger, enabling you to broadcast a help signal in a fraction of the time that it would take on your cell.
Sang-Hoon Lee's clever product quite simply integrates a small mouthpiece, a chamber and a hole into an otherwise standard-looking iPhone 5 case. The wind passage thickens the profile slightly, but that curvature serves to make the smartphone protector more comfortable to hold in your palm. Made from polycarbonate in Korea, the Hoo Whistle Case comes in pink, white and black with other punchy colors in the interior.