Retekess TR638 LCD Digital Display Full-Band Bluetooth FM Radio Support External Antenna Features: 1. LCD display with adjustable backlight brightness to bring you a better user experience 2. External antenna socket, you can connect your own antenna 3. Support Bluetooth to connect your mobile phone and play your favorite songs 4. Retractable 24-inch antenna to enhance signal and improve receiving sensitivity 5. Multi-band radio, FMAMSW radio to meet your various receiving needs 6. Support timing function, fall asleep while listening to music, and automatically turn on the news in the morning 7. More power and clearer sound 8. Good sound quality, providing clear broadcast Product parameters: 1. Receiving range: AM: 522-1710KHZ FM: 64-108MHZ SW: 2.3000-23.000MHZ 2. Receiving sensitivity: AM: 84dB FM: 18dB SW: :26dB 3. Quiescent current: 150uA 4. Maximum current: 800mA 5. Speaker: 4 ohms, 8W 6. Signal-to-noise ratio: FM is less than or equal to 40dB 7. Number of radio stations in radio mode: 110 can be stored 8. Bluetooth version: VER 5.0 9. Bluetooth receiving distance: 10 meters 10. DC: 1.5V (AA1.5 × 4) 11. AC: 220V, 50hZ, 110V, 60hZ 12. External input voltage: DC: DC 5V 13. TFUSB card playback format: supports MP3, WMA, WAV, APE, FAC, playback format 14. Maximum supported capacity of TF card: 256G 15. Power supply: adapter connected to power supplybattery power supply 16. Battery: No. 5 battery x 4 (battery is not included in delivery) 17. Material: ABS, electronic components 18. Product size: 210 x 125 x 60mm