Note: The difference between Radioddity FS-T1 and PR-T1 Difference FS-T1 PR-T1 Frequency FRS (22 channels) PMR446 (16 channels) Power 2W/0.5W (high-low power) Fixed 0.5W Highlight Functions ▸ NOAA weather scan & alert ▸ High/low power 2W/0.5W (FRS version only) ▸ 50 CTCSS tones and 104 DCS codes ▸ Voice-activated transmission (VOX) ▸ Monitor function ▸ Battery saving mode ▸ FM radio (87.5-108MHz) ▸ Dual channel standby ▸ TOT function ▸ SquelchNote: Press and hold ▲ or ▼ button for 3s to switch dual channels. Radio Features ▸ A/B band independent operation ▸ Keypad Lock ▸ Busy channel lockout ▸ Keystroke Tones ▸ Battery level indicator ▸ 10 different calling tones ▸ USB charging ▸ LED flashlight What are the pre-programmed NOAA channels? 1.162.500MHz 2.162.400MHz 3.162.475MHz 4.162.425MHz 5.162.450MHz 6.162.550MHz 7.162.525MHz 8.161.650MHz 9.161.775MHz 10.163.275MHz What are the pre-programmed FRS/PMR channels? Specifications General Frequency range: FRS/PMR Memory channels: 22 channels / 16 channels Antenna impedance: 50 Ohm Operating temperature: -10℃ ~ +50℃ Mode of operation same frequency: simplex Battery capacity: 1500mAh Dimensions: 6.69in x 1.97in x 1.10in (170mm x 50mm x 28mm) Weight: 0.26lb (120g) Transmitter RF power: US - 0.5/2W; EU - 0.5W Type of modulation: FM Maximum deviation (kHz): ≤±5.0 Spurious emissions (dB):