Rechargeable battery Li-ion polymer 120mAh Charge voltage DC1.8V, Charge time 2~3 hrs Standby time 150 hours Output Power 0dBm (class II) Power Consumption 30 mA 100uA standby Dimension: 64 mm(L) 28.5 mm(W) 11mm(H) Weight 55g (including battery) Operating Temperature - 10~55 degrees C Storage Temperature - 20~60 degrees C Certification CE, FCC Stereo MP3 player with earplug directly on the frame which can be moved back & forth Individually packed in white paper carton