The OMNITRONIC LH-055 PRO is a passive, single-channel DI box for converting an unbalanced, high-impedance instrument or line signal into a balanced XLR output for connection to a mixer. It provides one 6.3 mm jack input, a 6.3 mm link connection and one 3-pin XLR output. Input attenuation is switchable between 0 dB, -20 dB and -40 dB. The unit has a rugged silver metal housing, groundlift selector, 15–30,000 Hz frequency range and dimensions of 12.7 × 7.4 × 4.5 cm.