F911 Bluetooth-compatible Earbud Single Wireless Earphone Mini Headset Hands-Free Car Headphone Earpiece - Blue

• Bluetooth-compatible technology ensures a strong and stable signal, transmission is faster, power consumption is lower
• The built-in microphone adopts advanced noise reduction technology, blocking out disruptive background noise like wind, traffic or crowds, offers crystal clear audio and natural sound, and allows you to enjoy HiFi sound and bass music quality
• Fully ergonomic in-ear design, perfectly fit most ear size, so that you won't have a little pain even if used for a long time, very comfortable to wear
• Mini size, easy to carry.   You can put it into your jeans pocket, in your backpack, or even in a bigger wallet
• Ideal for gym, workout, sleeping, running, walking, etc

Specification:

• Sound unit: 8mm moving coil
• Speaker sensitivity: 95dB@1kHz
• Frequency response model: 20Hz~20kHz
• Microphone sensitivity: -38dBV/IPa
• Bluetooth-compatible version: 5.0
• Bluetooth-compatible effective range: 15m
• Battery type: Lithium-ion battery
• Battery capacity: 25mAh
• Waterproof grade: IPX4