9.Auto squelch 10.Auto power saving 11.Key tone 12.Key lock function 13.10 kinds of call melody tone 14.Built-in vox function (3 levels of voice volume) 15.Auto shut off while transmission time out 16.Remember function 17.Battery capacity indication 18.Low power alarming function 19.Roger beep on/off selection Dimensions: 200mm *90mm*70mm Weight¡êo260.4g/pairs