Product Description:
Condition:100% brand-new, unused, good quality 
Features:
Small size and light weight.
This is the newest anti-bark collar with the most intelligent system.
Controlled by a microprocessor which distinguishes your dog\'s bark from other environmental noises and automatically delivers ultrasonic and/or static shock after each bark.
The collar can effectively and humanely stops barking when it is worn on dogs.
An adjustable collar strap is suitable for most small and medium dogs.
Low battery consumption.
How it works:
An internal microphone picks up the sound and the unit is automatically activated. The bark control collar starts with emitting an ultrasonic sound of 1 second as a warning at the first bark. At the second bark the collar emits an ultrasonic sound of 2 seconds. From the third bark the collar emits a 3 seconds ultrasonic sound and gives 2-3 seconds static shock. The dog should stop barking. If the dog barks within 1 minute after the first static shock, the collar sends out a 3 second ultrasonic sound and 2-3 second of static shock. If the dog stops barking, the collar resets itself to the lowest level and repeats the first 3 steps. The shock levels can be adjusted with the delivered screwdriver.
Specifications:
Usage: Training & behaviour aids
Powered by: 2 * AAA batteries(not included)
Collar material: Nylon
Adjustable collar strap length: Approx. 36cm-48cm / 14.2-18.9in
Bark controller size: 7.7 * 3.5 * 3.8cm / 3.0 * 1.4 * 1.5in
Bark controller weight: 73g / 2.6oz
Color: Black
Net weight: 80 g
Package Content:
1 * Bark controller 
1 * Collar strap
1 * Test light 
1 * Special screwdriver 
1 * User manual