Shenzhen Defengyuan Technology Co., LTD which is a professional bluetooth keyboard, selfie stick, bluetooth anti-lost alarm and self-timer manufacturer.We have our own R&D team and factory. And we also accept OEM and ODM order. Our keyboard mainly use the standard USA broadcom bluetooth 3.0 solutions. So the quality is stable. We also add remote shutter on the blank key and multi-language can be customed.80% trading company of Shenzhen buy the keyboard from us and then export the meyboards to all over the world. We always get 100% good feedback from our clients.