Specifications: Model M2bluetooth Version 4.1 Charging Times 2h Working Times 5h Standby Time 15 Days Color Black / White
Features:1. Human Engineering side wearing design.2. Strong voice, Hi-Fi tone quality.3. Acoustic transmission, the pure copper wire inside high elasticity TPE, faster transmission.4. Alloy vibrating diaphragm.5. Double units speaker & dual moving coils.6. Sweatproof.7. Built-in microphone. Package Included:1bluetooth Earphone 1 Charger