High-Performance Sports Wireless Earbuds Black. The High-Performance Sports Wireless Earbuds from re-fuel are designed to keep up with you. The perfect workout companion, the BluetoothÂ® earbuds broadcast your playlist in crystal-clear definition, tuned to accentuate crisp highs, natural mid-tones, and rich bass. Wireless connectivity eliminates wires that can yank out of headphone jacks or tangle up during intense activity. Designed with military-grade sweat-resistant materials, securing shark fin ear tips, and a long-lasting rechargeable battery, you never need to stop mid-rep to adjust or recharge.