Marking device for lawn mower

A marking device comprising:

• a light-emitting unit configured to emit light;
• a housing configured to accommodate the light-emitting unit;
• and
• a support configured to support the housing,
• wherein the housing includes:
• a transmitting portion configured to transmit the light through a circumferential portion of the housing;
• and
• a roof covering the light-emitting unit accommodated in the housing,
• the transmitting portion includes a plurality of windows,
• the housing includes a side wall member formed between every two adjacent windows of the plurality of windows, and
• for each of the plurality of windows, two corresponding adjacent side wall members of the plurality of side wall members are arranged on two sides of the window in a front view.

A lawn mower system comprising:

• a lawn mower;
• and
• at least one marking device for the lawn mower,
• wherein the at least one marking device includes:
• a light-emitting unit configured to emit light;
• a housing configured to accommodate the light-emitting unit;
• and
• a support configured to support the housing,
• wherein the housing includes:
• a transmitting portion configured to transmit the light through a circumferential portion of the housing;
• and
• a roof covering the light-emitting unit accommodated in the housing,
• the transmitting portion includes a plurality of windows, and
• the housing includes a side wall formed between every two adjacent windows of the plurality of windows.