RECHARGEABLE BATTERY AND LOCK BUTTON DESIGN: This small radio is built-in 500 mAh rechargable battery, and working continuously for 10 hours after being fully charged. The lock button design (long press the "M-" key) prevents accidental operation when you put the radio in your pocketWHAT YOU GET FROM US: Not only Portable AM/FM Radio with 3.5 mm stereo earphones, USB Cable, Removable Clip and Lanyard, you get but also 12 month no-pressure product exchange. If there are any problem, please contact us at anytime, we will be always here to assist youFM STEREO SOUND: Comes with Cost-effective 3.5 mm plug stereo earphones, which provide rich stereo sound for this AM FM radio. 20 level volume control, the volume can be adjusted accurately according to the signal strength. Just put on your earphones, then can enjoy relax time. When using, please insert the earphone hard into the deepest part of the earphone jack of the radioMINI RADIO WITH REMOVABLE CLIP: Little radio with 3.3 x 1.8 x 0.5 inch and weigh only 1.5 oz, This pocket radio is around the size of a credit card, which takes up almost no space in the pocket. Removable back clip included for belt, pocket or backpack. It's quite convenient for walking, running, cycling, gardening and travelEXCELLENT RECEPTION: This AM FM portable radio Frequency range: FM:64/87-108 MHz; AM:520-1710 KHz. Excellent DSP digital signal processing chip and earphones wire cord as antenna(Suitable for any 3.5 mm plug headset), which make the radio to receive the signal more stably. Suitable for walking, jogging, camping, etc