F9-8 chip upgrade: Upgrade the 5.0 Bluetooth chip, pick up the automatic boot and matching. Operational function upgrade:One touch to switch previous/next song &volume adjustment wake up assistant. Large capacity charging cabin : Can be used for earphone storage box Charging for earphone/ mobile phone As a mobile phone holder. Enjoy &9D heavy bass : Enjoy the HIFI scene and enioy the immersive 9D stereo surround sound effect. Intelligent noise reduction: Enjoy HD call effects without being affected by noisy environment. Strong compatibility: Regardless of the brand mobile phone and model, Bluetooth-enabled devices can use this headset. We truly believe we make some of the most innovative products in the world, and we want to make sure we back that up with a risk-free ironclad 45 day guarantee. If you don't have a positive experience for ANY reason, we will do WHATEVER it takes to make sure you are 100% satisfied with your purchase. Buying items online can be a daunting task, so we want you to realize that there is absolute ZERO risk in buying something and trying it out. If you don't like it, no hard feelings we'll make it right. We have 24/7/365 Ticket and Email Support. Please contact us if you need assistance. Remember: Shipping usually takes 2-3 weeks read our Shipping for more details!