SereneLife PSLEDRT6 Dog Trainer Repellent with Flashlight/Powerful Ultrasonic Bark Stopper - Dog Trainer Device - Protect Yourself + Train Your Dog Multi-Functional: Used for Training, Controlling, Repelling - Handheld High-Frequency Operation Unobtrusive Non-Interfering Circuitry - Battery Operated, Requires (1) x '9V' Battery, Not Included Emits A Safe & Ultrasonic Sound - Distract, Direct Attention & Stop Barking Harmless & Ultra Quiet Performance - Safe for Use Around Children & Adults Built-in Flashlight & LED Indicator Light - Compact & Handheld Wireless Design