There are two ways to save channel: manual/automatically search. Receiving Sensitivity: MW: Better than 10 mV / M FM: Better than 18 dB SW: Better than 60μV Fixed frequency keys: 50-108MHZ FM1 frequency range: 50-88MHZ FM2 frequency range: 87-108MHZ FM3 (TV sound 1): 56.25-91.75MHZ FM4 (TV sound 2): 174.2-222.25MHZ MW (9K) 522-1620KHZ MW (10K) 520-1710KHZ LW (long wave) 153-279KHZ SW1 3.2-5.945MHZ SW2 5.95-9.495MHZ SW3 9.5-11.645MHZ SW4 11.65-15.095MHZ SW5 15.1-17.495MHZ SW6 17.5-21.445MHZ SW7 21.45-21.9MHZ Specification: Type: Type 1 (MW tuning step is 10 KHz), Type 2 (MW tuning step is 9 KHz) (Optional) Type 1: Suitable for the following countries: North and South America: Brazil, Canada, Chile, Columbia, Costa Rica, Dominican Republic, Ecuador, El Salvador, Guatemala, Honduras, Mexico, Panama, United States, Venezuela Asian: South Korea, Philippines, Taiwan, Southeast Asia: New Zealand Type 2: Suitable for other countries except the above countries. Number of storage stations: 60 (shortwave, medium wave, FM can store 20 radio stations). Single Signal Selectivity: better than 10dB Inside the Speaker: Diameter 57MM, 8 euro, 0.5 watts External Headphones: Diameter 3.5mm / 32Ω x 2 Battery: 2 x AA battery(NOT included) External Power Supply: External 3V-5V DC power supply Low Operating Voltage: 2V Stereo Resolution: 32dB Distortion: 1% Working Temperature: -15 - 80 () Output Power: 220mW Dimensions: 125 x 77.25 x 21 (mm) Package Weight: 190g Quantity: 1pc Package included: 1 x Full Frequency Receiver Radio 1 x Earphone 1 x User Manual