Cisco CP-6921-CL-K9-RF | Unified IP Phone 6921 Slimline

1. Display: 3.5-inch white backlit display
2. Ethernet Switch: 10/100BASE-T Ethernet connection
3. Protocol Support: SCCP and SIP protocols
4. Speakerphone: Full-duplex speakerphone with acoustic echo cancellation
5. Audio Codec: G.711a, G.711u, G.729a, G.729ab, and iLBC audio-compression codecs
6. Power: Supports IEEE 802.3af Power over Ethernet (PoE) or Cisco Power Cube 3
7. Call Controls: Five programmable line keys, four soft keys, and a navigation cluster
8. Headset Support: RJ-9 jack for handset, and RJ-9 jack for headset
9. Dimensions: 8.2 x 8.0 x 7.5 inches
10. Weight: 2.2 pounds
11. Operating Temperature: 32 to 104°F (0 to 40°C)
12. Humidity: 10 to 95% noncondensing

Notes:
1. The slimline design makes it easy to fit in small spaces.
2. The phone is compatible with Cisco Unified Communications Manager and Business Edition 6000.
3. The phone supports both IPv4 and IPv6 protocols.