The Dogtra 640C Tom Davis Edition is one of the most popular e‑collars in the balanced training world, known for its clean design, reliable performance, and trainer‑focused features. In this blog, we’re unboxing the 640C TD Edition and breaking down every function you’ll see in the video — Boost, Lock, HPP vibration, Nick, Constant, Continuous, charging, and how to set everything up properly.
Whether you’re new to e‑collars or upgrading your current system, this guide gives you a clear, trainer‑level understanding of how the 640C TD Edition works.
Unboxing the 640C TD Edition
Opening the box, you immediately see Dogtra’s clean packaging and the Tom Davis branding. Everything is laid out neatly, giving a professional first impression.
Inside the box, you’ll find:
1 – 640C TD transmitter
2 – 640C TD receiver
3 – TD Bungee E-Collar Strap
4 – Charging cable with splitter
5 – Enhanced Contact Points
6 – Belt clip
5 – User manual
The presentation is simple, organized, and exactly what you expect from a professional‑grade e‑collar.
Charging the 640C TD Edition
The 640C uses Dogtra’s dual charging system, allowing you to charge both the transmitter and receiver at the same time.
How charging works:
1 – Plug the splitter into the main charger
2 – One end connects to the transmitter
4 – The other connects to the receiver
5 – LED lights indicate charging status
6 – Full charge typically takes around 2 hours
Always fully charge the collar before first use to ensure optimal performance.
Feature Breakdown
Boost
Boost is an instant jump in stimulation above your working level. It’s designed for situations where you need a quick, stronger correction — for example, a dog breaking a recall or chasing something.
Boost should always be set relative to your dog’s working level, not randomly. It’s a safety feature when used correctly.
How to set up the Boost is shown in the video
Lock
The Lock feature on the Dogtra 640C TD Edition is designed to prevent accidental level changes, not accidental button presses. When the transmitter is in your pocket or clipped to your belt, the rheostat dial can rotate without you noticing. This can cause the stimulation level to jump from a low working level to a high level — which can result in an unintended correction.
Lock stops this from happening.
Lock is one of the most important safety features on the 640C TD Edition because it ensures your dog never receives a level you didn’t intend.
How to activate the Lock is shown in the video
HPP Vibration (Pager)
HPP stands for High‑Performance Pager. It’s a stronger, more noticeable vibration compared to standard e‑collar vibration modes.
Why trainers use HPP:
1 – Clear communication with deaf dogs
2 – Great for sensitive dogs
3 – Can be used it for recall
It’s not a stim — it’s a vibration signal.
Nick
Nick is a momentary stimulation. It fires once, instantly, and is used for clarity in obedience.
Nick is ideal for:
1 – Building clarity and sharpness in obedience
2 – Quick reminders such as fixing forging in heel
3 – Precision communication
Nick is one of the most commonly used functions in balanced training.
Constant
Constant is sustained stimulation that continues while the button is held. It’s used for pressure‑on / pressure‑off training.
Examples:
1 – Teaching leash pressure concepts
2 – Helping dogs understand directional cues
3 – Working through obedience behaviors
Constant is not meant to be held for long periods — it’s a communication tool.
First‑Time Setup for New Users
If this is your first e‑collar:
1 – Fit the collar snugly (no rotation)
2 – Find your dog’s working level slowly
3 – Introduce stimulation ethically
4 – Pair stimulation with leash pressure
5 – Avoid high levels unless absolutely necessary
6 – Keep sessions short and clear
The 640C TD Edition is designed to make communication clean and consistent.
Who the 640C TD Edition Is Best For
This model is ideal for:
1 – Pet dogs learning an reliable recall
2 – Off-leash obedience training
3 – Beginners who want a simple layout
4 – Balanced trainers
5 – Dogs needing reliable communication outdoors
It’s a versatile, professional‑grade tool suitable for almost any training scenario.
Final Thoughts
The Dogtra 640C Tom Davis Edition is a clean, reliable, and trainer‑approved e‑collar with features that make communication precise and consistent. From Boost and Lock to HPP vibration and Nick/Constant modes, this collar gives you everything you need for clear, structured training.
If you want a professional‑grade tool that’s easy to use and trusted by top trainers, the 640C TD Edition is an excellent choice.