● Up to 6 units can be added and used by using the transceivers. ※ The transceivers are included with the MM-BTMSP3. ● Easily mute the microphone with one button. ● Can be attached to the collar of your clothes with a clip. You can also connect earphones to the earphone jack to listen to audio. ● Even if you leave your seat during a meeting, you can convey your voice to the other party and listen to their voice. ● Can also be used as a single unit. Compatible standards: Bluetooth 5.0 ■ Transmission method: GFSK ■ Supported codecs: SBC ■ Frequency range: 2.402～2.480GHz ■ Communication distance: 10m ■ Supported profiles: HSP, HFP, A2DP, AVRCP ■ Power supply: Lithium polymer battery Charging time / 2 hours Continuous playback time / 12 hours Continuous talk time / 12 hours Continuous standby time / 200 hours ■ Playback frequency band: 100～20,000Hz ■ Microphone directivity: Omnidirectional ■ Charging port: microUSB