WHY KINGWorld KINGWorld Store is a professional electronic products manufacturer who has been devoting ourselves to make and promote electronic products that are user-friendly and practical. Our slogan is we will continue to improve our products and services, providing the most practical products and best services to all our customers! If you could not use our Bluetooth Headphones for running to connect your device, please reset the Wireless Bluetooth Headphones: 1.You could press and hold the MFB for 3s, then the Bluetooth Headphones for running enters the pairing mode, you could see whether the indicator light flashes red and blue alternatively. 2.You don’t pair any device, you need to press and hold the + and – volume 5s together. 3.You could see the indicator light flashes red and blue together. This method could solve the problem of difficult to connect our products. Bluetooth V4.1 Wireless Bluetooth Headphones V4.1 has stable signal, up to 33ft effective distance, lower power consumption, allowing you to enjoy music for a long time, faster transmission and pair speed. Ultra-light weight design & Comfortable & hands free This Wireless Bluetooth Headphones is weight about 0.51oz, the ultra-light weight and simple style ear wings designed to help stay in your ears snug, it does not cause any pain to the ears, you could take hands free so you can continue working out. Package includes 1x KINGWorld X21 Wireless Bluetooth Headphones Rose gold 1x USB Charging Cable 3x Earbuds (S/M/L) 3x Ear wings (S/M/L) 1x User Manual
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