Wll - 800 1x Specification Frequency rate: -rx frequency: 869.64 ~ 893.37mhz -tx frequency: 824.64 ~ 849.37mhz Air interface: -cdma 2000 1xrtt (backward compatible with is-95a/b) Vocoder: -13k qcelp, 8k evrc Main chipset: -msm 5000 Supporting a-key function Rs232 (9pin) port for data & diagnostic Data rate: -144kbps Environment: -operation: -10 ~ 50c- Storage: -20 ~ 70c Dimension: -160 x 173 x 61mm Weight: -680g include internal battery Features Data service Sms / vms service *pc-fax (is-707a, 4) Caller id 8 lines 4 gray wide lcd Back-up battery: -type: li-ion -capability: 3.6v1000ma -talk time: 60min -standby time: 24 hrs 2400 phone memories Calendar & calculator Setting connecting tone Lock mode & changing the lock code One touch dialing 3-way calling Alarm clock 5 ring tones & 5 melodies Language: -english (standard) -chinese (optional) Packing: boxes Composition (wll): main set x 1; hand set x 1; charger set x 1; antenna x 1; user's manual (english) x 1 & color box.