Coachi's Two-Tone provides two fixed ends in the documented 3,300-4,200 Hz range, allowing a trainer to condition separate cues or distinguish work with two dogs. It is rated at 100 dB, includes an adjustable reflective lanyard, and is described as dishwasher-proof. Two signals require more careful training than one, the pitch is not adjustable, and both tones remain audible to people.
The Coachi Professional offers an adjustable 5,500-8,500 Hz pitch range, a locking adjustment, a lightweight body, and an adjustable reflective lanyard at a low entry price. Its stated output is 90 dB. The public rating is weak, feedback about adjustment and tone is mixed, and the setting must be tightened correctly before relying on it as a consistent conditioned cue.
