Bluetooth 5.0 headset Macaron $ 16.07 Battery: polymer lithium battery Signal to noise ratio: 85dB Transmission distance: about 10~15 meters Launch standard: CLASS 2 Listening time: about 4-6 hours Standby time: about 120 hours Charging time: about 60 minutes Frequency response: 20Hz-20KHZ Frequency range: 2402MHz~ 2480 MHz ISM BAND Support Agreement: A2DP| AVRCP| HFP| HSP Core function: open cover pop-up window/dual channel/intelligent touch/master-slave switching
