Hudora Protectors LED

Product information "HUDORA LED Protectors"
If you're really on the move, even dusk can't stop you:
The HUDORA LED protectors protect you in poor visibility and shine brightly. Eleven LEDs built into the caps of the elbow and knee pads offer optimal visibility on skates, scooters, e-scooters, and skateboards. White light on the knees shines forward, while red warning lights on the elbows illuminate the back and sides. The set is available in sizes S, M, and L in black or gray/silver and includes hand protection – equipped with reflectors. For children, teenagers, and adults – optimal safety with the best wearing comfort!
Bright LEDs as a safety factor in poor visibility
4x11 LEDs built into the caps
Red warning light on the elbows illuminates backwards and to the sides
White light on the knees illuminates forwards
Also ideal for use on scooters or e-scooters
Comes as a protector set complete with hand guards (without LED)
Available in sizes: S, M, L
4 batteries included: CR2032, 3V lithium
Caution: To be used only with protective equipment. Not for use on public roads. For further information and warnings, please refer to the assembly and operating instructions.
Features 
For whom: Adults, teens, children 
Bundle: No 
One size fits all: L, M, S 
Light function: Yes 
Features: LED lights, red warning light on elbows, white light on knees 
Accessories: 4 CR2032 batteries included