These Wireless Ear Buds do not require a cord to connect to a mobile device, which allows for greater freedom of movement for the user. Technology items like these make unique Prom or Homecoming favors, cool school fundraisers, and fun student awards. No matter how they get them, your high school students will love the hands-free design and ease of use they offer. Equipped with Bluetooth® 4.2 Wireless Technology and a built-in microphone with volume control, the ear buds come nestled securely in a protective plastic travel case. They pair with a mobile device from up to 30 feet away for up to 2 1/2 hours of play time or 1 1/2 hours of talk time in dynamic stereo sound. A 55 mAh battery and a charging cord are included. Add your custom one-color imprint to the case to customize it for your school or event.