Features: Let you have fun when you are out running and doing extreme sports without worrying about your wireless earphone falling or missing. This is a great design. Lightweight, portable, you can take it everywhere you go and keep it in place around your neck, in your pocket. Using high quality silicone material, non toxic, eco-friendly, sweatproof and durable. It's super lightweight, feels great on your skin.you'll even feel nothing. The soft neck strap provides a soft touch and makes you feel comfortable when wearing it. Just put the device into the hole of this anti-lost belt, and it can be used safely. Installing and removing the straps only takes a few seconds. The bottom of the strap has an opening for the microphone. For its excellent elasticity,accidental pulls cause no break to the strap. Package Includes: 1x Wireless Earphone Cord Rope Specifications: Material:Silica Gel Size: Approx. 70cm/27.55inch Color: Black/Red/Green/Blue Compatible with Sony WF C500 note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thanks for your understandings.