Long-Distance Communication:Covering up to 1000 meters in open areas, this wireless intercom ensures clear communication across large spaces. High Capacity Battery:With a 2600 mAh rechargeable battery, the intercom offers a standby time of up to 45 days, minimizing frequent charging. Large Intercom Capacity:Supporting up to 9999 users, this intercom system is ideal compatible with large-scale office or factory environments. Strong Anti-Interference:Featuring AFH adaptive frequency hopping technology, the intercom resists interference from WiFi and Bluetooth devices. Multi-Functional Design:Equipped with a large LCD display and 58 polyphonic ringtones, the intercom offers a user-friendly and customizable experience. 1. Wireless audio intercom system can support 9999 persons intercommunicating at most. 2. Using 433MHz public frequency. 3. Air transfer rate: 256K. 4. Transmitting Power: Less than 18dBm, Receive Sensitivity: Less than -100 . 5. Strong anti-jamming capability. 6. Panel with 10 number buttons, a call button, and indicator lights 7. With coding, Giving code, and ID setting functions. 8. DC5V, or Li-ion battery power supply, Standby Current:1mA, Work current:650mA. 9. Communication distance: 1000 meters in an open area 10. AFH adaptive frequency hopping technology, strong anti-interference ability, can share the 2.4GHz frequency with a wireless network card and Bluetooth device. Plug Type:EU Plug,it applies to Indonesia, Germany, France, Spain, Italy and so on Voltage: AC220V Color: Black Material: plastic Package Contents: 1 x 2.4Ghz wireless landline phone Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.