[Easy to Use] This headset telephone features an LED display, flash and redial functions, 90, 95, 100, 120, 180, 300, 600, 1000 flash time options, and automatic and manual modes that can be selected for longer lifespan. [Noise-Reducing Microphone] The corded phone with headset is equipped with a noise-reducing microphone to enhance voice clarity, deliver premium sound, and truly present the operator's sweet voice. [FSK DTMF Caller ID] The keypad headset landline phone can mute the call when an incoming call is received and display the phone number, showing all content on this call center phone and headset. [Volume Adjustment] The wheel volume button on the corded landline phone allows for easy control of the sound and supports a mute function for a more flexible listening experience. [Widely Used] This telephone with headset can be widely used in telemarketing, telephone consulting services, hospitals, banks, telecom operators, companies, etc., fully meeting your usage needs. [Plug and Play] The headset landline phone is powered by the telephone line and requires no extra power source. Simply connect to the wall phone port to make and receive calls.