This product use LED and it can show what you want say to use it at fans party,singing performance,music entertainment and any outdoor or indoor match like baseball, basketball and so on.
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