The Quadra Thru is MIDI-powered, and requires no batteries or power supply to operate with most MIDI products (for more information read the Power FAQs). A MIDI indicator LED lights up when the product is powered and flashes when MIDI data passes through it. MIDI Solutions MultiVoltage products are compatible with both the original 5V and new 3.3V MIDI specifications, for more information read the MultiVoltage FAQ. Weight: 122 g (4.3 oz.)Dimensions: 112 x 62 x 31 mm (4.4 x 2.4 x 1.2)  
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