Amazon.com: RYOBI P20110 ONE+ 18-Volt Lithium-Ion Cordless Attachment Capable Brushless String Trimmer, 4.0 Ah Battery and Charger Included
Ryobi Expand-It 18-Volt Lithium-Ion Cordless String Trimmer Power Head (Attachment Capable, Attachments, Battery and Charger NOT Included) - Walmart.com
Ryobi ONE+ 18-Volt Lithium-Ion Cordless Electric String Trimmer/Edger Battery and Charger Not Included - Walmart.com
18V ONE+ HP BRUSHLESS WHISPER SERIES 15" STRING TRIMMER KIT
RYOBI 18V ONE+ HP Brushless String Trimmer - YouTube