Jaybird's X4 sport earbuds are redesigned and waterproof | Engadget
Original Logitech Jaybird X4 Wireless Bluetooth Sport Earphones Play Time 8 Hours Waterproof For Sport Fit Music & Calls Mobile - Earphones & Headphones - AliExpress
Jaybird X4 Wireless Headphones JUST $79 Shipped (Reg $130) – Today Only! | Free Stuff Finder
Jaybird X4 Wireless Sport Headphones Review: Some Tradeoffs
Jaybird X4 Wireless Sport Headphones - YouTube
Jaybird X4 Review: Has the king of Bluetooth headphones returned?
Jaybird X4 Wireless Review - RTINGS.com
The basics | In the box
Amazon.com: Jaybird X4 Wireless Bluetooth Headphones for Sport, Fitness and Running, Compatible with iOS and Android Smartphones: Sweatproof and Waterproof - Storm Metallic/Glacier : Electronics
Where can I find a Jaybird X4 replacement charger? | Android Central