Mini Bluetooth Headset Wireless Invisible Earbuds $ 4.67 Product information: Transmission range: 1-10 meters Function: Battery display, voice control, call function, support music, NFC function Bluetooth protocol: 4.1 Channel: Mono How to use: Earplug style Whether single or double ears: Unilateral hands-free Features: Bluetooth version: V4.2+EDR Transmission power: Class2 Wireless frequency: 2.4-2.48GHz Transmission distance: 10 meters Charging time: 1 hour (charging voltage 3.7V) Talking/listening to music time: 2 hours (100 hours standby) Applicable models are suitable for all mobile phones with Bluetooth function
