【LONG BATTERY LIFE & BUILT-IN MICROPHONE】The wireless headphones adopt the newest bluetooth technique, which offers a long battery life. Simply charge 2-2.5 hours, and last up to10 hours. Best tool for online study. They also feature a high-fidelity sound quality, which is very important enjoying music, offering your or your kids a ear feast. These bluetooth headphones for kids or adults have a built-in microphone and can be used for video chat, answering the phone, online classes or streaming.