1. An AM/FM/SW/BT/TF all-band stereo recorder equipped with Bluetooth functionality and a memory card slot, featuring a REC recording function, a subwoofer speaker, an MP3 playback function, and a sleep timer function. 2. An all-band AM/FM/SW/BT/TF stereo recorder supporting Bluetooth and memory card recording, audio cable input recording, and stereo headphone output, and comes with a replaceable external lithium battery. 3. Computer data transfer: Connect the device to the computer using a MicroUSB data cable. Press any button on the device, and the computer will automatically install the driver software. 4. When the device screen shows a prompt indicating a successful computer connection, it means the connection is complete. At this time, the computer can perform read, copy, and delete operations on the device. The internal TF card files (it can be used as a card reader) can also serve as an external USB computer speaker. (Note: There may be compatibility issues with some computers with different configurations.) 5. The K603 portable wireless Bluetooth radio has functions that meet your needs: it supports FM/AM/SW bands, has 3 recording modes, and is a subwoofer music player capable of playing MP3 and WMA files. You can record your favorite music or talk show programs from the radio, and also use the built - in microphone to record external sounds. This multi - functional radio not only allows you to enjoy listening to the radio but also brings you pleasure. 6. Key features: - Bluetooth functionality enables connection to mobile devices for more experiences. - Headphone output function allows you to immerse in the world of music. - Speakers paired with a subwoofer diaphragm produce clear sound. - Quick station/ track selection: You can directly enter the radio frequency or song number. - Supports 3 languages: Chinese, English, and Spanish (optional). - AM adjustment increment can be 9K/10K. - Sleep timer can be set for up to 90 minutes. - Repeat modes: All - loop/ single - loop/ folder - loop. - Adjustable LCD display. 7. Specifications: - Supported storage type: Flash card (not included in the package and needs to be purchased separately). - Bluetooth version: BT5.0. - Audio formats: MP3, WMA. - Screen resolution: 128 * 64. - FM frequency range: 87 - 108 MHz. - AM frequency range: 522 - 1710 KHz. - SW frequency range: 4.75 - 21.85 MHz. - Number of storable radio stations: 100. - Headphone output interface: Standard 3.5mm stereo interface. - Audio input interface: Standard 3.5mm dual - channel interface. - Charging data interface: -USB - 5P. - Power: 2W. - Lithium battery characteristics: -5C. - Color: Black. - Material: Plastic. - Dimensions: 120 * 79 * 23mm. 8. Package contents: - 1 K603 radio (with battery). - 1 USB charging cable. - 1 lanyard with a stand. Only the above items are included in the package, and other products are not included. Note: Light and different displays may cause slight differences between the color of the item and the actual situation. A measurement error of ±1 - 3cm is allowed.