Style: handhold Note: MUST CONNECT WITH THE POWER CABE BEFORE YOU USE!! It doesn't with the battery. GUIDANCE FOR VENIPUNCTURE:Provide a more clear vein view, You can easily find the exact location of your patient veins works on any type of tissue.(Note:Can detect the blood vessel depth: less than 0.47"). Not recommend to use on the face or other small blood vessels. HD IMAGING AND DF2 TECHNOLOGY: This health gadget is ideal for alternate care facilities, as well as for regular home health care services. Lightweight design: this handheld vein finder can be carried around easily anywhere you go, This makes it an extremely useful gadget for traveling doctors and nurses that provide help at home. SAFE TO USE :It is 100% radiation-free,Near-infrared light This vein finder must connect with the power cable that can be work. If you have any problem during after purchasing our product, please feel free to contact us, we will provide our best service for you