NSKI Mini Radio Frequency Meter With CTCSS/DCS Decoder or Handheld Portable Frequency Counter NSKI-560S Text Walkie Talkie Frenquency:100-520MHZ CTCSS/DCS Decoder Fits for 1-30W Radio Quick Search, driving records, Battery: 9V 6F22 (Internal 3.7 volt rechargeable battery)