Feature: 1. Made of high quality ABS plastic material, anti‑oxidation, wear resistance. 2. Built‑in battery, can charged by USB, can used for a long time once charged, long standby time. 3. Simple to use, does not have negative impact on pets. 4. Wear for your dog to prevent barking, durable and long service life. 5. Suitable for all kinds of dogs, easy to carry and store, convenient to use. Specification: Condition: 100% Brand New Item Type: Pet Bark Stopper Material: ABS Color: As Pictures Shown Suitable Pet: Dogs Function: Wear for Your Dog to Prevent Barking .Receiver Battery Type: Lithium Battery Capacity: 450 mah Model: None Remote Control Battery Type: Lithium Battery Capacity: 500 mah Model: None Size: Remote Control:Approx.13x4.5x2cm/5.1x1.8x0.8inReceiver:Approx.6x3.5x2.5cm/2.4x1.4x1in Weight：Approx.237g/8.4oz Package List: 1 x Reflective Collar 1 x Receiver 1 x Charging Cable 1 x Chinese Manual 1 x Test Light 6 x Metal Conductive Column 4 x Silicone Conductive Column 2 x Blue Protective Cover 1 x Hanging Rope 1 x Remote Control