:. . New DECT Technology 40 - 16000 Hz Frequency Convertible Over the Head / Ear Headset Easy Hands-Free Conversation Bluetooth 5.0 Technology Noise-Canceling Microphone Convenient Flexible Boom Controls: . - Mute Calls . - Volume . - Answer/End Calls . - Reject Call . - Status Indicator Fully Rechargeable Battery . - 1.5 Hour Recharge Time . - 13 Hours Runtime . - 52 Hours Standby Time Up to 492' Range Near Field Communication (NFC) Mono Sound Output Mode Uni-Directional Microphone Operation Mode..