Product Description Key specifications: OEM order service Supported Item Wireless Headphone Chipset Airoha1561 Wireless Version V5.0 Support Touch TWS, IPX4 Waterproof , HFP, HSP, A2DP, AVRCP Key Function volume up/down; Song next/last; MFB Pair/Pick/Hang/Recall Effective Range 10 meters/30 feet Music Time about 9 hours Battery Charging case : 500mAh Power Bank function, Earbuds Lithium Battery 90mAh Charging time 45mins hours to earphone, 2 hours to charging box Microphone Built-in Related Products Contract US Our Factory 1- More than 4000m2 production workshop with over 472 experienced workers. 2- Over 12 years of Wireless development and production experience. 3- Rich and successful OEM/ODM experience. 4- Over 100 regular partners from 52 countries and regions. 5. 12 months long warranty and mature after-sale service. 6- Total is 12 production lines ensure our production capacity of 500K Bluetooth headset and 100K Bluetooth speaker and other Bluetooth items per month. 90% of our production equipment is imported from Japan and Germany to offer our customers the best competitive advantage PRODUCTS. We have served for Amazon Best Seller & Top Rated Sellers , Deal with us, Get Stable Repeated Profits WELCOME TO BE ONE OF OUR TOP "VIP" CUSTOMERS". WE BELIEVE THAT " THE QUALITY IS THE SOUL OF AN ENTREPRISE". WELCOME TO CONTACT US. "with us your MONEY in safe ; your BUSINESS in safe" Rambotech Sustaining Employee Training&Team Work : Certifications Packing & Delivery