Computer software program. 50 groups of CTCSS. 16 memory channels.  Power save function. Channel scan function. Low battery alert. Built-in CTCSS/DCS function. Frequency range: L : 400-430MHZ; H: 440-470MHZ.  Freq.circuit: PLL Circuit. Form: With the frequently single worker or the different single worker frequently. DV Voltage: DC7.2V±15%. Operation Temperature: -30°C~+60°C Receiver: Sensitivity: (12db SINAD), 0.16uV; Modulate  bandwidth of receiving: ±7KHz; Adjoint channel alternative: ≥70dB; Depend  and suppress: ≥65dB; Noise responding: ≥60dB; Audio Power Output: 500mW Less than10%; Channel expands the range frequently: 20MHz. Transmitter: Power Output: ≤3W; Mode: F3E; Miscellaneous wave and wave in harmony: ≤-65dB; Frequency modulation noise: ≤-45dB; Modulation Distortion: <5%(300-3000Hz); MAX.Freq.Deviation: <5KHz(1000KHz100%); channel expands the range frequently: 24MHz.