18V, Telescopic Shaft, Power Source: Battery, Battery Life: 50 min
From Amazon
Ryobi OLT1832 ONE+ Cordless Grass Trimmer, 25-30cm Path (Zero Tool), 18 V, Hyper Green (Battery, Charger and Blade Not Included)
BatteryUpgrade
Ryobi OLT1832 battery (6000 mAh 18 V, Black)