Make your brand much more visible for marketing success with these Smooth True Wireless earbuds! They've got Bluetooth 4.1 technology with a Bluetooth profile of A2DP/HFP/HSP/AVRCP and a wireless range of 10 m. 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 Charge Time: 4 hrs. You can charge the earbuds on the power bank approx. 15 times. Add your company name or logo for maximum visibility. With these, your brand could become the talk of the town!