SPEAKER DRIVER UNITS : AND #934; 40 X 20.8 MM FREQUENCY RANGE : 140 HZ – 20 KHZ IMPEDANCE : 4 AND #937; RATED POWER : 3W SENSITIVITY (SPL) : 85 DB @1W/0.5M MICROPHONE MICROPHONE : 2 X OMNI-DIRECTION MICROPHONES FREQUENCY : 100 HZ – 10 KHZ SNR : 64 DB(A) GENERAL POWER RATING : 5V/1A LED INDICATION : TEAMS EVENT CALL STATUS MICROPHONE MUTE VOLUME RANGE AUDIO PERFORMANCE : ENC (ENVIRONMENTAL NOISE CANCELLATION) AEC (ACOUSTIC ECHO CANCELLATION) AUTOMATIC GAIN CONTROL DOUBLE TALK BEAMFORMING INFORMATION CERTIFICATION CERTIFIED FOR MICROSOFT TEAMS, COMPATIBLE WITH SKYPE™ FOR BUSINESS SHIP GROUP (WHAT’S IN THE BOX) LENOVO GO WIRED SPEAKERPHONE LENOVO USB-C (FEMALE) TO USB-A (MALE) ADAPTER TRAVEL POUCH START MANUAL WARRANTY POSTERS WARRANTY 1 YEAR CONNECTIVITY INTERFACE USB-C, USB-A ADAPTER CABLE LENGTH 79 CM