Features 1.DSP DIGITAL SIGNAL PROCESSING CHIP: Mini radio uses an excellent DSP digital signal processing chip for more stable reception and better reception in weaker signal locations. Frequency range is FM 87?108MHz, AM 520?1710KHz. 2.STEREO SOUND: AM FM pocket radio has a built in compact but clear sound quality speaker with stereo headphone sound (headphones included), so you can enjoy stereo sound anytime and anywhere. 3.RECHARGEABLE BATTERY: Pocket radio has a built in 500mAh rechargeable battery that can operate continuously for up to 10h on a full charge. The lock button is designed to prevent accidental operation when the radio is in your pocket. 4.VOLUME CONTROL: AM FM portable radio comes with 3.5mm plug stereo headphones for rich stereo sound. Volume control for accurate volume adjustment according to signal strength, meeting your various needs. 5.WIDE RANGE OF APPLICATIONS: Mini digital radio is great for walking, running, biking, gardening, traveling or other outdoor sports. Simply put on the headphones and enjoy your relaxation time. specificationItem Type: AM FM Portable Radio Size: Approx. 80x57x17mm / 3.1x2.2x0.7in Product Material: ABS Color: Black Battery: Lithium Ion Battery 402030 (Built In) Capacity: 500 mAh Frequency Range: FM: 87-108MHz, AM: 520-1710KHz Interface: Micro USB, 3.5mm/0.1in Headphone Jack, Small Memory Card (Maximum 32GB) Headphones: Stereo Headphones Features: FM Stereo, Alarm Clock, Time, Sleep, Scan Storage Station PackageList1 x AMFMPortableRadio 1 x Earphone 1 x Charging Cable 1 x Hand Strap 1 x Instruction Book Note1. Please allow some error due to manual measurement. 2. Insert the headphones firmly into the deepest part of the radio's headphone jack when in use.