Smart Bike Helmet With LED Display, $21.19 on Amazon (Reg. $53)

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Amazon has a great deal on this waterproof smart bike helmet with LED display, now $52.99. Use the 10% off coupon and apply code WJ9E35ZI to get it for just $21.19.

This bike helmet features remote and app control, turn signals, a DIY image display function, and a built-in speedometer.