Equipped with 600mAh rechargeable battery, it has long standby time and can play music continuously for a long time. Lanyard design allows you to hold the player around your wrist conveniently. With high-performance loudspeaker, the radio has full bass and clear treble. LED light can not only indicate the charging state, but also can be used as flashlights. It is made of ABS material with high impact and wear resistance to ensure long-term durability. The length of the product is 12.4cm, the width is 5.1cm and the height is 2.2cm. It has FM radio function and can play TF card, U disk or MP3 music files. You can switch mode freely between USB/TF/FM/AUX (M button). If you press the "repeat" key, it can repeat the current music or all MP3 music. When the player is in the charging state, the LED indicator will light up, otherwise it means no charging. It is compatible with most mobile phones, tablets, laptops, MP3, MP4, etc. Item Name: Radio Material: ABS Model: Y-501 Battery Capacity: 600mAh (Included) Interface: Headset, AUX, USB, Charging Port, TF Card Slot Output: 3.7 V-4.2 V + 0.05 V Input: 5V Output Power: 3W Snr: 85dB Impedance: 5 Frequency Response: 200hz-21khz Radio Frequency: 78mhz-108 mhz Features: Portable, High Sensitivity, LED Flashlight Size Details: 12.4cm x 5.1cm x 2.2cm/4.88" x 2.01" x 0.87" (Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x Radio (Battery Included) 1 x Charging Cable 1 x User Manual