What is the price of a v4.0 system?

1 Net Device and 2 Line Devices (the most affordable configuration) can be purchased for $499 USD. For international orders, the bank of the charged credit card will make the currency conversion.

Which configuration do you recommend?

The In/Out v4.0 system is composed of Net Devices and Line Devices. Net Devices are like chair umpires. They are installed on the net posts. Line Devices are like line umpires. They are installed along the lines they are monitoring. It's recommended to start with 1 Net Device and 2 Line Devices for the base lines.

What is the purpose of the Line Devices?

Line Devices give accuracy. As they are aligned with the line, they help to provide millimeter-accuracy line calling judgment.

Are you storing credit card information?

No, your credit card information is directly entered into the Stripe payment service. It is NOT stored on the In/Out server at any moment. Credit card is the only payment method possible on the In/Out website.

What is included for each order?

For a Net Device order: the Net Device itself, the net post attachment and its band for tennis, or a tripod for Pickleball, a USB cable and a carrying case to transport the device in your tennis gear bag. For an order including Line Devices: 2 Line Devices, 2 extractable batteries, 2 USB cables and a carrying case.

Can I install the device on any net post?

Yes. The smart attachment with the strap that goes around the net post has been designed to work on as many different net posts as possible. One strap is usually enough. If it's too short (some very old net posts), a second strap can be purchased from us.

How long does it take to install the Net Device?

In 1 minute, the Net Device can be up and ready to do line calling judgment on the net post.

How long does it take to install the Line Device?

In 30 seconds, you can install a Line Device. The procedure consits of aligning the Line Device with the line you wish to monitor. The Line Device automatically connects to the Net Device without anything special to do.

Can In/Out be powered from a power outlet?

Yes, v4.0 can be fully powered from a power outlet so you are not dependent of the limited time of a battery. Just use a standard USB power plug and use a USB cable connected to the device.

What are the differences between the different hardware versions?

Version 1.0 was released in October 2017, version 1.1 in April 2018, version 2.0 in September 2019, version 3.0 in February 2021, version 4.0 in December 2024.

The Net Device has been improved along five generations to take into account the feed-back of the users.

Can any version of the Net Devices be mixed?

Yes. All Net Devices are compatible between each other.

Can I use only the Line Devices?

No. Though the Line Devices make their own calls, the information is transmitted to the Net Devices. The Line Devices assist the Net Device(s) the same way the line umpires assist chair umpires.

Is there any software upgrade restriction?

No, there is no software restriction. The latest firmware is backward compatible with any In/Out hardware including the oldest v1.0 hardware.

How many Line Devices do I need? Which setup are you recommending?

For an amateur match, 1 Net Device and 2 Line Devices aligned with the baselines is recommended. The side lines are well covered by the Net Devices are they are in the same direction of the cameras of the Net Devices. The base lines are more difficult for the Net Devices because the cameras are in a perpendicular direction and at a low height. This is why the first 2 Line Devices should be dedicated to the base lines.

For professionnal tournament, you can consider the setup of 2 Net Devices and 6 or 8 Line Devices, 1 Line Device per line. You will get outstanding accuracy like on TV.

What is the accuracy of In/Out?

1 device is ideal for video and stats but it cannot provide great accuracy. To get millimeters accuracy, it's recommended to purchase 2 Net Devices and 2 Line Devices. As a comparison, the ITF requires 5mm accuracy for grand slam tournaments and an average ATP/WTA line umpire usually can not do better than three to five centimeters with a high reliability (proven by studies). Players (including you - sorry about that) usually do mistakes even higher than 20 centimers. Here is an example of Alexander Zverev making a 50-centimeter error in front of him: https://www.youtube.com/watch?v=IxXOPKXskoE.

How long does it take to install the Line Devices?

In seconds, the Line Devices just need to be aligned with the baseline. There is no pairing or long procedure needed. You even do NOT need to fire a test ball.

What software is shipped with the In/Out device?

In/Out firmware can be used on all 1.0/1.1/2.0/3.0/4.0 versions. In/Out upgrades are free forever. Access to the cloud with all your stats is free forever too. We will never charge for software upgrade and cloud. You can export data in a JSON or CSV format. It includes the ball bounce timestamp. The only restriction is that data access is free for personal usage - you cannot use data for commercial purpose without our agreement.

Can it work for doubles play?

Doubles is currently supported though the system handles better single. It's constantly being improved along the monthly firmware upgrades.

What's the difference between using 1 and 2 Net Devices?

The experience is exactly the same. The advantage of 2 Net Devices is better reliablity and better precision. For video and stats, 1 Net Device is enough. For doubles, 2 Net Devices are highly recommended to avoid player occlusion.

What is the warranty?

The warranty is six months long from the date of shipping and covers failure of the electronics parts. In any case, we never charge for labor repair, only parts even after the end of the warranty period.

Which countries are you shipping to?

We ship worldwide. Please visit the store and select your destination country in the drop-down. If your country is not in the list, contact inout@inout.tennis.

What is the shipping method and pricing?

Shipping to USA for 1 set including 1 Net device and 2 Line Devices is free and takes 3 to 5 business days. International shipping is added at cost. it takes between around 2 weeks to reach the destination country. There is no handling fee in any case.

Do I have to pay taxes in the website store?

You have to pay taxes on the In/Out website (8.5%) only if your shipping address is to California.

On which surface does the In/Out device work?

Any surface. Hard court, carpet, clay, grass. As long as there are white lines. For clay, it's recommended to clean the lines before calibrating the Net Device on the court.

Does it work indoor? Does it work under the lights?

Yes, though the lights need to be of good quality.

What's the storage capacity of the Net Device?

There is 4GB of internal storage. There is also an external SD card slot for use of any of your existing cards. Any microSD card should work.

Does the device is forced to make sound to call a ball in or out?

No. You can modify the device settings so that the device produces light or loud sound or both or nothing for each line calling judgment.

Does the device support pickleball?

Yes! The In/Out hardware can handle many sports. Note that a different attachment is needed. Please visit the pickleball support page.

If your question is not answered, you can ask us by email. The In/Out system can be purchased in the store.