Erard CLIFF 400 127 cm (50") Black 50070123 10000370 2 RF connectivity Yes Frequency 507024 00250 2 RF connectivity Yes Frequency response (talk mode) 100 8000 Hz Frequency response (music mode) 20 20000 Hz Wireless range 30 m Headphones Ear coupling Circumaural Microphone Microphone type Boom Microphone frequency 100 8000 Hz MEMS (Micro Electro Mechanical System) microphone Yes Number of microphones 2 Microphone direction type Omnidirectional Folding microphone Yes Microphone mute Yes Battery Battery operated Yes Battery type Built in battery Battery technology Lithium Ion (Li Ion) Battery capacity 240 mAh Continuous audio playback time 20 h Talk time 18 h Fast charging time 5 min Fast charging Yes Charging source USB Battery recharge time 2 h Number of batteries supported 1 System requirements Windows operating systems supported Yes Mac operating systems supported MacOS Mobile operating systems supported Android The NPX G1040 meets convenience paging requirements for facilities of all sizes 2 cm (30") Maximum screen size 127 cm (50") Mounting type Wall Minimum VESA mount 75 x 75 mm Maximum VESA mount 400 x 400 mm Panel mounting interface 75 x 75 400 x 400 Ergonomics Distance to the wall (max) 2 cm Design Product colour Black Other features Number of products included 1 pc(s)