1. 2.4GHz digital wireless telephone
2. Speaker of mainframe
3. Support to 3 handsets
4. Speaker of handset
5. Talk-back with handsets Between cell phones & Calling Divert
6. Transfer outside line both the mainframe & the handset
7. Intercom conversation among mainframe and handset
8. Handset Ringing volume can change
9. Frequency jumping technology provides high confidentiality and free of interr