This is industry quality DC power adapter with 9V, 2A output. It has barrel jack connector. This adapter works well with arduino specially for duty applications that need relatively high current

Specifications

• Input: 100-240V AC 50/60Hz
• Output : 9V, 2.0A
• Dimensions:80(L) x 45(W) x 30(H) mm
• Cable length: about 110CM
• Output adaptor : Barrel Jack