Etross-6188 is gsm fixed cordless desktop telephone that support sms and fm radio, just insert gsm mobile sim card to make and receive calls, no need plug phone line cable. Gsm fixed cordless phone descrition: Spanish&english language quad band etross 6188 wireless landline Brand:etross or oem brand Model no.: etross-6188 Product name: gsm fixed cordlesstelephone/phone Frequencies: quad band gsm850/900/1800/1900mhz Features: 1. Support gsm850/900/1800/1900mhz 2. Caller id 3. Language:spanish, english, french, russian, portuguese, arabic(optional) 4. Sms function 5. Ip no. Setting 6. Software upgrade jack 7. Data service, support csd and gprs class 10/8. Connect pc by usb port 8. Call in / call out /call divert/ call waiting limitation function 9. Lock up function: sim card, network, cell and operated company 10. Local no. / direct no. / limited no. Setting 11. Speed dial function 12. Redial function 13. Support three-way conference call 14. Save more than 100 sms on the phone 15. 7-level headphone volume and silence adjustable 16. Speaker phone 17. Low-power indicator 18. Storage 20 missed call or received calls and the last ten dialed number 19. Voice mail function 20. Packing size (mm): 220*160*53 21. Support stk1114 22. Emergency call: at off-hook or hand-free state, can calling emergency number without Operating requirements: 1. Operating freq.: gsm900-1800mhz/850-1900mhz automatically switch 2. Normal operation temperature: -30 ---70 Restricted operation temperature: -30 ---80 Storage temperature: -40 ---85 3. Environment noise: below 60db(a) 4. Support simcard 1.8v/ 3v 5. Channel interval: 200khz 6. Receive sensitivity: