I use this one everyday and it is quite cheap to pick one up. https://www.amazon.com/Avantree-Bluetooth-Wireless-Keyboard-Warranty/dp/B00VWEK4IG/ref=sr_1_1_sspa?s=pc&ie=UTF8&qid=1521719290&sr=1-1-spons&keywords=bluetooth+adapter+for+pc&psc=1&smid=A1C41W6V7R1EVA