This is the latest version of GP-330 with a newly designed collar receiver and remote range can go up to 600 METERS in open fields. The new collar receiver is SMALL IN SIZE (approx 4.5cm*3.7cm*3cm, L*W*H, L excluding brackets) but the small size does not reduce the effectiveness of corrections on large dogs. The collar receiver is solid built, rechargeable and fully waterproof / submersible and your dog can wear it for any out-door training. It comes with a large capacity rechargeable battery; The handset transmitter is using 9V battery and water-resistant (not submersible). It has large buttons with intuitive layout for easy access and instant delivery of correctional signals. GroovyPets GP-330 is a simple and effective dog training tool in the palm of your hand. It can help you teach your dog basic obedience commands and stop behaviors like digging, jumping, eating poo, chasing sheep, bark controlling, and a lot more. More Information about the 3 Correction Modes Warning Tone Correction: There are TWO groups of warning tones in different frequencies. Each warning tone beeps twice per button push. If you push and hold this button, it will beep 9 times then change to a different tone with 9 beeps, then stops. These can be used for praise and warning for your dog. Vibration Correction: There are TWO levels of vibrations. It vibrates once per button push. If you push and hold it, the collar will vibrate 6 times, then changes to stronger vibration for another 5 times, then stops. This can be used for warning, or deterring your dog or other obedience training purpose. Static Pulse Stimulation Correction: There are 10 levels of static pulse stimulation corrections from nothing, mildest to strongest). The zero level virtually disables the shock feature of the collar system. If you are concerned about accidental shocks, please make sure the level pointing at zero level(while dot mark next to the thumbwheel. Main Feature Easy matching-up procedures between handset and receiver; Can train up to 3 dogs from 1 transmitter; Rechargeable fully waterproof collar receiver with ON/OFF button; There are 3 correction modes: warning tone (2 groups); vibration (2 levels); static stimulation (10 levels); Ergonomic transmitter with large button for convenient use. Transmitter is water-resistant only using 9V battery. Flashing green LED light to show which channel is on so the corresponding dog is going to be trained; Range up to 600 meters (in open fields); Long and short prongs for all coat types; Low battery consumption; Low battery indicator on both transmitter and receiver. Collar Receiver: Collar unit size: L*W*H: approx 4.5cm (excluding brackets)*3.7cm*3cm; Collar strap adjustable from approx 20cm to 60cm (You can also use your own strap as long as it does not exceed 2mm in thickness 17mm in width or contact us for a longer strap); Collar strap is made of high quality TPU(Polyurethane) coated nylon webbing. It is strong, robust and waterproof. BLACK strap will be sent out by default for one dog system. Weight: approx 2 ounces/ 58g (excluding collar strap); Rechargeable (charger output: 5V1A). Remote controller/transmitter: Size: L*W*H: approx 14cm*4.5cm*2cm (L*W*H, length includes antenna) Weight: approx 82g/3 0z(with 9V battery installed); Power: 9V battery Package includes: 1 x Remote controller/ transmitter with 9V battery; 3 x Rechargeable collar receivers with 3 sets of short(installed) and long prongs 3 x quality TPU collar straps(black, orange and blue); 1 x Test bulb for testing static pulse stimulation correction - normally packaged with longer prongs in a small plastic bag (for testing purpose only, not to be used when the collar receiver is on the dog); 1 x Charger with dual charging plug (5V1A); 1 x Detailed User's manual (English). Frequently Asked Questions Q1: Is the stimulation safe for my dog? A: While the stimulation is unpleasant, it is harmless to your dog. Electronic training devices require interaction and training from the owner to achieve desired results. For GP-330 model, we have set static stimulation at Level 1 to be extremely mild so that it can be used on sensitive healthy dogs. Level 9 will be a lot stronger compared to Level 1 so that it can also be used on stubborn healthy dogs. Q2: How old does a dog have to be before using the remote training system? A: Your dog should be at least 6 months old and in healthy conditions. Your dog should be able to learn basic obedience commands such as “Sit” or “Stay”. Q3: Once my dog is trained and has been obeying my commands, will my dog have to continue to wear the collar receiver? A: Your dog may need to wear the collar receiver from time to time for reinforcement. Q4: Is the collar receiver waterproof? A: Yes. The collar receiver is heavy duty and completely waterproof and submersible, specially designed to be worn outdoors day after day without problems. Q5: Can I use the remote training system on aggressive dogs? A: We do not recommend any of our products to be used on aggressive dogs. We recommend you to consult your local veterinarian or professional trainer to determine if your dog might be aggressive. Q6: What do I do if my dog’s neck becomes red and irritated? A: This condition is due to the contact points irritating the skin. Discontinue use of the collar receiver for a few days. If the condition persists beyond 48 hours, consult your local veterinarian. Once the skin returns to normal, replace collar receiver and monitor the skin condition closely. Free USPS Priority mail or Low cost overnight delivery via USPS EXPRESS MAIL. Buyers will receive an email with tracking info immediately after order is processed. 5-10 USPS Priority mail or 5-7 days delivery via USPS International Express mail. MONEY BACK GUARANTEE. REPLACE ANY FAULTY PARTS WITHIN ONE YEAR WARRANTY PERIOD.