This is a lawn mower from Metabo, which applies so-called mulching, where the lawn is fertilized with the grass.
From Amazon
RM 36-18 LTX BL 36 (601716850) Cortacésped de batería
Conrad Electronic
Metabo RM 36-18 LTX BL 36 Rechargeable battery Lawn mower w/o battery 18 V Cutting width (max.) 36 cm