3ft Piggyback extension cord has an extra female NEMA 5-15 power pass through port to power 2 devices using 1 outlet - 1 to 2 outlet saver power cord reduces wear and tear of power outlets - Attach bulky power adapters to wall outlets or maximize space on power bars without blocking other outlets - Short 3-prong electrical extension cable with durable PVC connectors; Flexible strain relief - UL Certified for safety 16AWG NEMA 5-15P to NEMA 5-15R - StarTech.com Lifetime Warranty.