The Rycom 8878 offer excellent versatility and simple to operate. The 8878 has three active frequencies (815 Hz, 8kHz, 82kHZ) and passive 60 clycle . The multiple power setting transmitter delivery a powerful 2.6-watts. Peak, null and pinpoint locating modes, together with a refined graphical display, improves the receivers performance. Push button depth and current measurement make this unit simple to operate.