Multifunctional hand-cranked Bluetooth speaker, hand-cranked power generation/Bluetooth 5.4/hands-free call/AUX playback/TF card playback Wireless listening, powerful music experience: Bluetooth connection, AUX interface, TF card playback, built-in microphone, hand-cranked power generation, hands-free call Bluetooth 5.4, high-speed wireless connection, a of Bluetooth 5.4 technology, 10 meters long-distance connection stable transmission, low power consumption, no jamming Lossless decoding, TF card plug and play, support TF card playback, MP3 format file plug and play to enjoy your music at FM radio, let life have more mood, listen to your favorite radio station anytime, anywhere, enjoy to add more fun to life Product name: Multifunctional hand-cranked Bluetooth speaker Bluetooth version: Bluetooth 5.4 Bluetooth effective distance: Less than 10 meters Product size: 98 x 61MM Product weight: 266.8g FM frequency: FM87.5-108 Audio input method: Bluetooth, U disk, TF card, AUX (Different factory batches, if there is a difference in silk screen printing, it not affect the use) colour: Black material: ABS+Aluminum Alloy Shell Package Contents: 1 * Hand Crank Bluetooth Speaker 1 * USB Cable Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.