Volkano Rush 2.0 Series Bluetooth Earphones - Pink (VK1106PK) - Bluetooth Version: 4.2, Range: 10 m / 33 ft, Driver Size: 10 mm, Impedance: 32 Ω, Sensitivity: 98 dB, Frequency Response: 20 Hz – 20 kHz, Battery: 55 mAh, Playtime: 3 – 5 Hours, Charging Time: 2 Hours, Power Requirement: 5V DC, 1A, Packaging Dimensions in mm: 110 (w) x 180 (h) x 40 (d)