Condition: 100% brand new_x000D_ Item Type: Wireless intercom _x000D_ Material: ABS plastic_x000D_ Color: As pictures shown_x000D_ Machine Classification: Host extension_x000D_ Digital Screen Display: Caller ID function_x000D_ Host Interconnection: Up to 100 units by pressing the ID key to call each other_x000D_ Host + Multiple Extensions: Up to 100 interconnected extensions can call the host with one key. The host can call the extension by pressing the ID button._x000D_ Communication Distance(in Open Area): Approx.1000m/3280.8ft_x000D_ Power Adapter: _x000D_ Input: AC100V~240V_x000D_ Output USB Interface: DC5V/2A DC_x000D_ Installation Method: Free installation on the desktop_x000D_ Code ID Setting Function_x000D_ Ringtones Change Adjustment, Volume Adjustment_x000D_ Buttons: 10 digital buttons, 1 call button, 1 setting button_x000D_ Working Current: 400mA _x000D_ Standby Current: 70mA_x000D_ Transmitting Power: -100dbm_x000D_ Working Frequency: 433MHz_x000D_ Applicable Situation: Company, factory, hotel, office, tea house, KTV, hospital, entertainment venue, etc. 1Full?duplex wireless voice intercom, no wiring required. The extension of the main unit can display its own number and caller ID. 2The working frequency is 433MHz, and the intercom system can support up to 100 intercommunication without stringing codes. Can realize the networking function, greatly improve your office efficiency. 3The highest wireless intercom is up to 1000m/3280.8ft, so you are not restricted by a room. 4The highest built?in battery can reach 60 days of talk time without charging, more practical. 5One?key calling function, one?key calling host function, one?key broadcasting function, no need to wait for the call. The sound ringtone can be adjusted to allow you to customize the call ringtone and volume. 6Suitable for company, factory, hotel, office, tea house, KTV, hospital, entertainment venue, etc.1 x Intercom Phone Host1 x Intercom Extension2 x Power Adapter2 x USB Cable