Item Type: Corded Telephone with Headset Material: ABS Flash Time: 100ms or 600ms Recording Interface: 3.5mm Headphone Jack Number of Incoming Call Number Records: 32 Groups Number of Outgoing Number Records: 8 Groups 1、NOISE CANCELING: Corded landline is equipped with noise canceling microphone, which can improve voice clarity for superior quality sound.  2、FLASHING FUNCTION: Corded landline supports flashing time 100ms or 600ms, supports selection of auto mode and manual mode, plug and play, longer service life.  3、CALLER ID: Corded telephone has LED display, supports FSK and DTMF, rings or mutes when an incoming call is received, and displays the phone number and supports redial.  4、ADJUSTABLE VOLUME: Call center telephone has a scroll wheel volume button that allows you to easily control the sound and adjust it as needed.  5、WIDELY USED: Corded call center telephone is suitable for telemarketing, telephone consulting service, insurance, hospital, bank, telecom operator, enterprise.