Gadget Watch: New gear to trick out your iPad, your bike and your camera

Whether the weather is wet or dry, we've got you covered this week. Waterproof headphones and speakers, and some nonslip bike pedal covers, will let you carry on in the rain or in the lake. And a flash-booster, replacement keycaps and a big twisty knob will keep you entertained indoors. Don’t forget your umbrella (or sunglasses)!