Give out these Vibe wireless earbuds and get customers to shop with you first for all their needs! They're made of aluminum and have Bluetooth 4.1 technology with a Bluetooth profile of A2DP/HFP/HSP/AVRCP and a wireless range of 33 feet. They also come with a charging case with a 2000 mAh battery that doubles as a power bank for other devices and charges up the 40 mAh earphone battery. Other specs include: Input: 5V 1A, Output: 5V 1A, Talk/Play Time: 120 mins, Stand-by: 20 hrs, Earbud Charging Time: 2 hrs, Power Bank Charging Time: 4 hrs. Lastly, the earbuds can be charged by the power bank approx. 15 times. Add your company name or logo for maximum visibility. Let clients know they can't go wrong when they choose you!