KING DO WAY Modern MDF Wood Grain Triangle Desk Bed LED Digital Alarm Clock with Temperature Function Clap on Sound Control Material: Medium-density fiberboard Wood(not real wood) and graining coating; Color: as shown; Size: appr.15*9*8cm; Power source: 4 x AAA batteries(Not Included) or USB&lt;br&gt; Sound Control Mode Select(Power-saving mode on AAA battery) Please Press"DOWN" "on:SD" means Sound Control works(The clock will not stay on continuously but as you touch the clock it comes on for a few seconds an go back off); "--:SD" means Sound Control closed(displayed and work on continuously) Brand New Product, if the clock you received did not turn on, or any mistake or badness caused by improper operation It is the first and important step. PLEASE PUSH THE"RESET"BY BOTTOM.!!! Package included: 1x LED Clock, 1x USB Charging Cable, 1x Instruction. (For more product details, please refer to the manual)