Wireless bluetooth earbuds, comes with a charging case, and can be a perfect solution for your wire tangling problem, along with being an ideal promotional product. Imprint your brand/logo for promotion. Features Bluetooth version: Bluetooth V5.0 Speaker size: 10mm S/N: 98 ± 3dB Impedance: 32O ± 15% Frequency: 20-20KHZ Battery capacity of charging case: 200mAh Effective distance: 10 meters Built-in battery capacity: 40mAh Music playing time (70% of the battery): 3 hours Charging time: =1.5h Price Includes: Free setup Free 1c silkscreen imprint on 1 side Free standard shipping to 1 continental US commercial location