This is an infrared control helicopter that is easy to fly. However, after using it a few times, it was stored in a closet for a long time. It is presumed that the rechargeable battery in the main unit has deteriorated, and it can no longer be charged. The exterior is as clean as new. This is a junk item, offered only to technicians who are knowledgeable about electricity and have the skills to replace small rechargeable batteries, etc. The transmitter seems to be working fine, as the lamp lights up. The transmitter also functions as a charger. - Type: Helicopter - Remote Control Type: Transmitter - Color: White/Black - Features: Easy-to-fly design - Function: Digital proportional control system - Equipped with LED lights - Includes instruction manual - Requires 5 AA batteries for the transmitter (sold separately). Total length: Approximately 200mm Someone, please fly this thing again! Thank you.