This Innocent-Looking Bracelet Has A Nasty Surprise For Any Muggers

There are a whole host of gadgets on the market for keeping people safe on the streets - sprays, apps and alarms - but many of them aren’t that easy to use or are inherently indiscrete.Now a Dutch gadget company has designed a wearable piece of jewellery, that looks a little like a FitBit, to stop would-be muggers from attacking victims.And the bracelet has a secret power.Shown at the Consumer Electronics Show (CES) in Las Vegas, the Invi self-defence security bracelet is a totally nonviol