Details:Caleocom is notable for innovative wireless intercom systems. Here again is the newest innovation in wireless intercom system originated and branded Caleocom. It is unique with its LCD screen for icon displays, rugged but simple to manage and operate and standardized for durability with 1 year absolute warranty,  designed for class, ease of communication, convenience and comfort.It comes with great features according to every customer's requirement for private and public use at homes, offices and big businesses with regards to its expandable units of 1 to 126  extensions, communication distance of between 500 to 1000m, customizable caller ID numbers 1 to 9999 and powered by a powerful rechargeable 18650 battery available everywhere in the local market.Wireless Intercom phone with display screen- 15 usersThe wireless desktop intercom system connects up to 100 EXTENSION units. The communication range is 400 to m(1km), can cover up to 8 to 10 storey Building. This long range transmission is boosted by the 433Mhz frequency modulation which has no interference with our local frequency.  The intercoms has internal battery backup as a provision and protection for our frequent power fluctuations and failure. The internal battery has the capacity and capability to power the system for over 24 hours without electricity. The battery life everything being equal is over 10 years.The detachable USB adapter and power cable technology allows a power bank emergency charging. This intercom system has already been programmed and coded with ID caller numbers. It is a plug and call system requiring no installation. It features multiple selectable ringing tones up to 38 selections and up and down volume level. THIS PACKAGE IS FOR 15 USERS  1.its has 2 to 100 programmed intercoms 2.Its distance range is from 1m   to m(1km) communication range. 3. Internal battery backup DC5v/3.7v lithium(45hrs standby) Mhz non interference frequency 5. Preprogrammed caller ID numbers(0 to 99) 6. 38 different selectable ring tones 7. 3 levels up and down volume selection. 8. Desktop surface mounting(wall & surface mount) 9. USB detachable power adapter and cable. 10. Power bank emergency rechargeableWireless Intercom phone with display screen- 15 users