Battery box and instructions for use:
power switch
voice receiver
The battery box is hidden at the back of the black pad on the back cover. Please remove the back cover before use as shown in the figure. Please remove the back cover before wearing the helmet. Please wear a 60cm head circumference and bring your own helmet battery. Please install the back cover after use.
Four #5 (AAA) batteries
Remote control battery: one No. 7 battery
$354.99
