Apollo 1500 series linear actuator,12VDC battery powered, AC or solar, perfect for single or dual residential, farm and ranch applications. Easy to install and low maintenance, the 1500 series linear actuators have proven reliability and durability with more than 100,000 installations. Get up to 300 cycles or 30 days usage on a basic system before requiring a recharge.* Adjust gate to site specific needs with the automatic adjustable close timer. Independent, field-adjustable open and close speeds available on 1550 and 1551 models. Adjustable force sensitivity for automatic safety reverse on all models. Two-year warranty.