The Garmin PT10 Add-On Electronic Dog Training Collar is designed for versatility and reliability. It's compatible with both the PRO 70 and PRO 550 handhelds, allowing you to expand your training pack. With this collar, you can train up to 6 dogs on a single PRO 70 handheld or 3 dogs on a PRO 550 handheld. The range is impressive, covering up to 1 mile. Fast shipping ensures you get started quickly. The PT10 features remote-operated LED beacon lights for low-light conditions and built-in BarkLimiter technology, activated directly on the dog device. This collar is built to withstand tough training and hunting conditions, with a water rating of 10 meters.Key Benefits and Features: Dimensions: 3.1" x 1.7" x 1.7" Weight: 3.5 oz Battery: Rechargeable lithium-ion (included) Battery life: 60 hours Beacon lights: Yes Vibration: PRO 550 only BarkLimiter mode: Yes Tone: Yes