?The JF-900D2 50-Level Training Tone &amp; Vibration &amp; Stimulation 1000m Remote Dog Trainer offers a new tool in behavioral training， easy-to-use and effective. Built with 50 levels of correction using training tone with mild vibration and stimulation， it is totally safe and harmless to your beloved pets. By activating stimulus in the collar， this trainer gently guides your dog to learn desired behaviors and cease unwanted ones. Its LCD screen displays exact numeric level of stimulation clearly and accurately. Moreover， it works in an ultra large range up to 1000 meters. Don’t hesitate to buy one!                                    Features            Up to 1000-meter working range50 levels of correction using training tone with mild electric vibration and stimulationTotally safe and harmless to your beloved petsLCD screen displays exact numeric level of stimulation clearly and accuratelyExpanded up to 2 dogs， two paired receivers can be controlled at the same time or separately                                                            Specifications            Transmitter Dimensions    (4.92 x 1.97 x 1.10)" / (12.5 x 5 x 2.8)cm (L x W x H)    <br>Receiver Dimensions    (3.35 x 1.97 x 1.38)" / (8.5 x 5 x 3.5)cm (L x W x H)    <br>Distance Range    39370" / 1000m    <br>Weight    19.05oz / 540g    <br>Applicable Pets    Dogs    <br>The Main Material    ABS    <br>Model    JF-900D2    <br>Color    Black    <br>                                                            Package Includes            1 x Remote Control2 x Receivers2 x Collars1 x Manual1 x Power1 x Discharge Column1 x Test Light