Support Bluetooth 5.4 dual-mode specification (LMP 12.45 real Bluetooth 5.3 standard). 5.4 Bluetooth dual-mode and dual-channel, compatible with Bluetooth 2.0,3.0,4.0,5.0 and 5.1. Support protocols: HFP/HSP (hands-free phone/headset) A2DP/ AVRCP (stereo music) HID/HOGP (keyboard and mouse), Android smart phone, etc.
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