Product Description 

• Condition : 100% New
• Premium Quality
• Efficient
• Original Product
• Attractive Design
• ErgonoMIc in-ear design, comfortable to wear, not easy to fall off
• Connect with two devices at the same time
• High-quality MIcrophone design can effectively reduce environmental noise
• English / Chinese language, voice prompt: incoMIng call number, low

Product Details 

• Bluetooth version: 4.2
• Transmission distance: 10m
• Frequency response: 100Hz-10KHz
• Output sensitivity: 111dB±3dB
• Mic sensitivity: -44dB±3dB
• Playing time: about 2.5 hours
• Standby time: about 62 hours
• Charging time: about 2 hours
• Battery capacity: 50mAh
• Resistance: 14Ω±20%
• Rated power: 4mW
• Driver unit: 10.45±0.05mm