Grandstream GS-GXP2200EXT Expansion Module for VoIP Phone WiFi Access Points Rich and strong stereo sound

Rich and strong stereo sound with 5 watts of power

but also has RJ45 serial port

Tether App allows easy access and management with your mobile devices remotely

Superb quality prints and no waste with individually replaceable 5 single inks system Superfast document printing

Supports up to 10 SIP accounts per handset

Grandstream GS-GXP2200EXT Expansion Module for VoIP Phone WiFi Access Points Rich and strong stereo soundKey Features 128x384 backlit LCD display 20 programmable dual color buttons per module, 2 pages per module (40 contacts total) BLF speed dial Daisy chain up to 4 modules for up to 160 contacts extensions BLA (bridged line appearance) SCA (shared call appearance), BLF (busy lamp field, standard or eventlist), Call Park Pick up, Speed Dial, Presence, Intercom, and conference transfer forward and more 1 year limited warranty