Charging protection: protection function for battery overcharge and overcurrent. Low voltage protection: When the battery power of the receiver is lower than 6.5V; the receiver automatically stops working. Item number: E-1 Speed: 15km/h Motor: 2 130 brushed motors Product Specifications: 290X140X100 mm (LxWxH) Governor: two-in-one brushed ESC Product battery model: 3.7V 500mAh lithium battery Frequency: 2.4G HZ Remote control distance: 30 M Color box size: 52.5X12.5X19.5 cm Remote control category: full scale synchronous control system ( control) Remote control time: about 20 minutes Charging time: about 3 H Remote control battery: 2*1.5V AA battery(not included) Colour:green :Plastic + Metal Package Contents: 1 x RC Tank 1 x Remote Control 1 x USB Charger 3 x 7.4V 500mAh Battery Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.