Jaybird X4 Wireless Sport Headphones Review: Some Tradeoffs
Jaybird X4 Wireless Bluetooth In-Ear Headphones with Microphone, For Sports, Running and Fitness, Customisable EQ, Rechargeable, 8 Hour Battery Life, Smartphone/Tablet/iOS/Android - Alpha Metallic : Amazon.co.uk: Electronics & Photo
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
Jaybird's X4 sport earbuds are redesigned and waterproof
Restored Jaybird X4 Wireless Bluetooth Headphones for Sport Fitness and Running, Compatible with iOS and Android Smartphones: Sweatproof and Waterproof - Black Metallic/Flash - Walmart.com