This radio has four search mode, they are manual search, automatic search radio, full automatic search and store radio, convenient and easy. Power supply is built-in 700mah large capacity lithium battery, 3.7V lithium battery, can connect DC5V external power supply. The chip has a powerful memory, and can store 50 radio stations in each band. Portable design, easy to take it out. Specification: AIR: 118-138MHZ5K/50K STEP SEL Sensitivity: 2UV10DB SNR FM: 87.5-108MHZ0.1MHZ STEP Sensitivity: 2UV30DB SNR AM: 520-17209K/10K STEP SEL Sensitivity: 3MV/M20DB SNR CB: 25-28MHZ5KHZ STEP Sensitivity: 1UV10DB SNR SW: 2-30MHZ5KHZ STEP Sensitivity: 30DBUV26DB SNR VHF: 30-223MHZFM-N/FM-W Sensitivity: -5DBUV20DB SNR Power Supply: 700 MAH 3.7V Lithium Battery Speaker: 40MM, 1W, 8Euro External Source: 3.5MM Earplug Product Size: Approx. 103 * 60 * 15mm / 4.1 * 2.4 * 0.6in Weight: 160g / 5.6oz Minimum Operating Voltage: 2V Stereo Separation: 32DB Distortion: 0.5% Output Power: 200MW Color: Black, Gold (optional) Package list: 1 * Radio 1 * Headphone 1 * Charging Wire 1 * User Manual 1 * Lanyard 1 * Extended Antenna 1 * Ear Cap