DESC: Catch the attention of others with this bright, multi-led, flashing battery and DOES NOT INCLUDE clear battery door. LED's flash in concert with each other creating an exciting light show. FEATURES: 1. 3.6V, 900mAh Li-ion flashing battery 2. 44 count Blue/Red/White "USA" Flashing LED's. 3. REQUIRES a clear battery door. *Flashing feature ONLY for TDMA and GSM phones. Check your phone's manual for compatibilities.