The OMNITRONIC WP-4S is a passive 2-way PA wall speaker for 100 V public address systems. Its trapezoidal ABS cabinet is designed for corner installation and includes a mounting bracket. The speaker uses one 4-inch polypropylene woofer and one 1-inch polypropylene tweeter with wave guide, providing a frequency range of 90–20,000 Hz, 89 dB sensitivity, 101 dB maximum SPL, and 20 W RMS rated power. It is suitable for installations in restaurants, bars, hotels, and sports facilities.