This is the Castle Creations Talon 90 25.2V 90A Electronic Speed Control.

Features:

• Ideal for extreme 500 and 550 class helis and sport (6S) 600 setups also fixed wing aerobats up to 10 lbs (4.5 kg) and scale ships up to 20 lbs (9.07 kg)
• BEC offers 20 amps peak power and 9 amps of continuous power
• Castle Link compatible

Specifications:

• Input Voltage: 3-6S LiPo
• Max Continuous Amperage at Full Throttle: 90A (rating determined with 5mph airflow across the ESC)
• BEC Voltage: User selectable 6 or 8V
• BEC Output: 20 amp peak 9 amp continuous
• Dimensions: 1.7 x 3.14 x 0.7 (43 x 80 x 18mm) mounting bracket adds 2mm depth and 8mm width
• Weight: 3.0oz (84.5g) with 5.9 (150mm) power wires and no battery connectors