SonicGear Earpump Studio 2 Bluetooth Headset - Black Features: - Bluetooth connectivity for wire-free audio listening - Ergonomic headband design for a snug fit - Soft ear cushions and cup design provide long-wearing comfort for all head sizes - Durable high-gloss UV coated surface is easy to maintain - High-sensitivity microphone for clean and clear communication in-line - Push-to-talk button on cable for easy access Technical Specifications: - Driver size: 40mm - Total built-in driver(s): 2 - Frequency response:20Hz-20kHz - Impedance:32 ? - Sensitivity:105db(s.p; at 1khz) - Maximum input power :30mw - Cable length: 1.35m - Bluetooth version: 4.2 - Wireless distance: up to 10 meters - Supports HSP, HFP, A2DP, DI, and AVRCP What's in the box 1 x Earpump Studio 2 1 x USB Charging Cable 1 x Audio Cable 1 x User Manual