Stihl Dynamic GPC 30 Face Hearing Protection Battery & Electric mower All numerous trailers and trailer Stihl All numerous trailers and trailer attachments of the Professional series can be combined with the John Deere 6920 tractor to better illustrate to young farmers how fields are tilled and thus agricultural produce is grown Battery type Lithium Ion Battery voltage 36 V Engine Motor type PMDC (2 brushed) Control Connectivity Not applicable Equipment Knife length 50 cm Teeth opening 20 mm Battery charger 40 C80 Dimensions Product size length 230 Insulating value 31 dB H value 35 dB M value 29 dB L value 19 dB With double headband to support the back of the head and ear defenders