Check the listing for details. Dogtra 1902S HANDSFREE Plus Boost and Lock: Remote Dog Training E-Collar. Condition: New. Listed at 429.99 USD. Dogtra 1902S HANDSFREE Plus Boost and Lock: Remote Dog Training E-Collar Transform your dog training experience with the Dogtra 1902S HANDSFREE Plus Boost and Lock Remote Dog Training E-Collar. Designed for professional trainers and pet owners alike, this innovative e-collar offers exceptional control, versatility, and comfort for you and your dogs. With its HANDSFREE Plus functionality, Boost and Lock stimulation levels, and a durable, ergonomic design, this collar is the ultimate tool to nurture your furry friend's behavior with precision and care. Whether you're managing basic obedience, correcting undesirable behaviors, or training for advanced tasks, the Dogtra 1902S ensures effective communication between you and your dogs. Engineered for training two dogs simultaneously, its 1-mile range and advanced features make it perfect for outdoor adventures and professional training sessions.