Specifications: - Magnetic Bud Storage - Walk & Talk - Wireless Earphones - Bluetooth Version: 4.1V - RF Range: Up to 10 metres - Operating Voltage: 3.3V/3.8V - Charging: Micro USB - Battery: Built-in Li-ion rechargeable battery 2000mAh - Talk Time: Up to 8 Hours - Music Playback Time: Up to 6 Hours - Standby Time: Up to 120 Hours - Operation Temperature: -10 Degree to 60 Degree Celsius - Dimensions: 167.3 x 135.6 x 16.9mm What's in the box 1 x Volkano Marathon Series Bluetooth Wireless Sports Earphones