How do I turn off the sleep mode for the HV-KB558CM keyboard? kb558cmYingjie ZhangMar 26, 2021 Share Unfortunately the sleep feature cannot be turned off. Tags: Kb558cm Share Previous articleNext article Subscribe to Newsletters And receive HAVIT's latest news and deals Your email Subscribe100% free, Unsubscribe any time! Follow us Featured products Gamenote MS963WB Tri-Mode Gaming Mouse Sale price¥7,500 JPY 30 reviews HAVIT KB875L RGB Backlit Mechanical Keyboard Sale price¥15,700 JPY No reviews HAVIT H655BT PRO ANC Over-Ear Noise Cancelling Wireless Headset Sale price¥13,000 JPY No reviews