(ONLY ALLOW TO MUTE DURING CALL ON PHONE). A separate mute key is not added, but the control panel is simpler and clearer. 【Stable Connection and Quick Reconnection】Gixxted Bluetooth headset ...

2.5mm jack curly clable with Plx QD "Works with Ciso SPA Series and other Cordless phones with 2,5mm Standard Headset Port.(3 poles with 2 black bands), No Smart phone use. Works with Grandstream ...