Joining True Wireless Stereo Earphone

* mini wireless sports earphone * Communication: Wireless * Connectors: USB * Use: Mobile Phone * Function: Microphone * Cord Length: 10cm * TYPE: Omni-direction, Electret microphone * Sensitivity: -42db @ 1KHZ * Operating voltage: 3.3V * Frequency Response range: 100Hz-20Khz * Resistance: More than 2.2K Ohm * BT version: Blue tooth 5.0 * BT Frequency Range: 2.4GH * Receive Sensitive: -80dbm * Frequency: 2.402G Hz-2.480G Hz * Working Distance: ≤10m