Ultra-light aluminum alloy frame, weighing only 14.3 kg. Four seat width options: 14.5", 16", 18", or 19", with corresponding total widths of only 19", 20", 22.6", and 23.6", making it especially easy to navigate through narrow spaces. Quick-release lithium battery that complies with UN38.3 and MSDS aviation standards, approved for air travel. Travels approximately 13 km on a full charge. An additional battery can be purchased for +$2000 [SKU: SBME-0002] to extend the range to approximately 26 km. Two charging methods: plug into the controller or directly into the battery. Includes 3 controllers for convenient caregiver control: 1 x wired front controller, 1 x Bluetooth wireless rear controller, and 1 x Bluetooth wireless remote control.