USED-B bull 4 SIP Lines bull 7,1 cm ( 2,8 inch ) color display and 6,1 cm ( 2,4 inch ) LCD display for BLF bull HD audio bull User-friendly menu with help function bull Power supply via POE or power supply bull Handset (HS) / Handsfree (HF) / Headset (HP) bull Desktop / Wall mounting bull Economical and environmentally friendly packaging bull Industry standard certifications: CE / FCC High interoperability - Compatible with major platforms: 3CX, Asterisk, Broadsoft, Elastix, Zycoo, etc.