Stereo Bluetooth Headphone Wireless Bluetooth Earbud Portable Stereo Hands Free Wireless Bluetooth Headphone FM Radio Magnetic

Specifications
Material: metal
Color: Black, blue, red, brown
Frequency: 40Hz-18KHz
MIC sensitivity: +/-42dBm
Radio frequency range: 2.4GHz-2.48GHz
Bluetooth protocol support: A2DP V1.2, AVRCP V1.4, HFP
Bluetooth version: BT V4.1
Transmission distance: 10 meters (transmission distance mayvaries according to different mobile phone or BT device and environmental factors)
Headphone battery: 3.7V 70mA (built-in lithium battery)
Charge voltage: Micro USB 5V
Voice hints: support
Mobile phone power display: support
MIC: support
Signal-to-noise ratio: more than 90dB
Distortion: less than 1%
Support TF Card: 128M-32G(not includ)
Frequency of voice: 87.5-108MHz
Interface: Micro USB interface *1, TF interface *1
Product size: 1.9*1.2*1.2cm