6500 W PowerEase Portable Gas Generator: This generator features electric / recoil start, low oil shutdown, automatic voltage regulator, 9 in. flat free tires, digital multimeter (hours voltage, frequency), fuel gauge, automatic idle down, and circuit breakers (1 x 23A 240V AC Dual Pole, 2 x 20A 120V AC, 1 x 10A DC).

• 6500 W Max Output
• 5500 W Continuous Output
• 5500 W Continuous Output
• 2 x 120 Volt Receptacles
• 1 x 120 Volt Twistlock Receptacles
• 1 x 240 Volt Twistlock Receptacles
• 120/240 Volt
• 1 - 23 Amp, 2 - 20 Amp Breakers
• 25 l Gas Tank
• Electric Start Ignition
• 12 Volt DC - 10 Amp Breaker

please view links below for NEMA connector info 

NEMA Chart

20-30AMP WIRING INSTRUCTIONS

20-30AMP LOCKING PLUG AND CONNECTORS