Lenovo ThinkVision E22 40 21.5 inch FHD IPS Monitor Motion Sensor Hood Designed for comfort and convenience IP67 cordless phone Designed for comfort and convenience 2 with USB C Adapter Wireless Range Up to 30 m Speaker Size 28 mm Speaker Frequency Range (Music Mode) 20 Hz – 20 kHz Microphone Type Noise Cancelling Boom Microphone Microphone Technology MEMS Microphone Array Number of Microphones 2 Active Noise Cancellation Hybrid ANC Design Bluetooth Multipoint Up to 2 Devices Paired Device Memory Up to 8 Devices Talk Time Up to 16 Hours Talk Time with ANC & Busylight Up to 10 Hours Music Playback Time Up to 18 Hours Music Playback with ANC Up to 15 Hours Charging Time Approximately 120 Minutes Fast Charging 30 Minutes for 50% Battery Compatible Operating Systems Windows Designed with a 3 side NearEdgeless bezel profile and VGA inputs to accommodate modern and legacy systems