-USB chargingBuilt-in 500mAh battery, charge for 1.5 hours, you can listen for 10-12 hours.Automatically and save; Lock (Pause/Play in MP3 state)Time setting; Sleep mode (timed shutdown)MP3 (32G memory card can be installed, there are four kinds of that can be switched, and MP3/WMA two music formats can be played)Type: AM / FM Radio ReceiverFM: 87-108MHzAM: 520-1710kHzPower supply: lithium batteryBattery capacity: 500mAhCharging time: 1.5hPlaying time: 10-12hCharging voltage: 5VCharging Port: -USBMaximum TF card capacity: 32GB (not included)Size: 80x57x17mm/3.15 x 2.25 x 0.67 inchesStyle: Portablecolor:Silver greyMaterial:plasticPackage Contents:1 x Radio Receiver(US version)1 x HeadsetOnly the above package content, other are not included.Note: Light and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm."