10-100 feet control range: Automatic Pairing, 10-100 feet control range or more. Suitbale for multi players to drive together without Interference at the same place and time. Make kids experience the fun of race, exercise hand-eye coordination. Rechargeable Battery for 25+ Min : The RC construction toy comes with 4.8v 400mah Ni-MH rechargeable battery. Charging for 2 hours can be used around 25+ minutes, which provides longer entertainment performance. Don't stop the fun! All battery passed MSDS test and ensure safety. There is Automatic Power-off Protection. It will automatically disconnect the power to protect the battery. (Note: The battery is out of charge upon arrival, please cahrge it first.)