Article: You can put any number of radios on a single frequency as long as they’re all using the same transmitter and receiver. Get a number of radios based on how many people you want to have a radio. If you’re just planning on chatting with a friend, get a pair. If you’re hoping to staff a security team or other set of professionals, get 10-20 radios based on the number of employees or team members that you have.  All of the walkie talkies that you plan on using need to be the same make, model, and brand. You may notice that it becomes difficult to track what people say if you have more than 10-15 people on a single frequency. This is a common issue with cheaper radios. If you want to use walkie talkies as a baby monitor or listening tool, get a version that has a “monitor” mode. While the radios may have been charged before they were packaged, it’s a good idea to get them to full power before using them. Plug them into the charging stand or USB charger and wait until the light on the radio indicates that they’re fully charged. Take the radio off of the charger and turn the dial at the top to turn it on. On most radios, you’ll see a green light turn on. If it has a screen, this should pop on as well.  Every style of walkie talkie is different, but almost every type of radio will have a light on the charger or walkie that turns on when it’s being charged. Some radios use batteries instead of chargers. These aren’t a good option if you’re planning on using your radios regularly, since the batteries can be a pain to replace. Some cheaper radios won’t have dials. Look for a power button if you can’t find a dial to turn it on. Start with one radio. Turn the dial that says “channels” or “frequencies” to the “1” position. If there isn’t a dial on top, look on the side for a wheel and rotate that to “1.” If frequency is set on the LCD display, work through the menu until you find the setting to change the channel or frequency and set it to “1.” Repeat this process for every radio that you plan on using. Before you split up the walkie talkies, make sure that they work by testing every single radio you plan on using. Turn the volume up as high as it will go and press the “press-to-talk” button before saying something. The press-to-talk button is usually the biggest button on the side of the walkie talkie. Confirm that each radio works before splitting them up.  Once the radios are split up, it’s a good idea to test them again just in case they’re out of range or something is wrong with the antenna. If channel 1 isn’t working, move to channel 2. Sometimes the individual frequencies get a little messy. This can be caused by other radio waves or interference. The number of frequencies ranges from 2-10 based on the type of radio you have. If none of the channels seem to work, double-check the volume knobs. Then, if they still don’t work, look on each radio for a sync button. Hold the sync buttons down at the same time on every radio to link them up. If you’re setting up radios for a security team, construction crew, school staff, or hospitality team, you need to get earpieces so that the conversations over the radio remain private. Get a set of radio earpieces that work with your brand of radio and have a built-in microphone. Plug an earpiece in, wrap the speaker around your ear, and press the button on the microphone built into the cord to talk to the other radios.  To be on the safe side, buy your earpieces from the same company that makes your walkie talkies. This will ensure that they’re compatible. Earpieces will also keep the person using the walkie talkie from missing information due to ambient background noise.
Question: What is a summary of what this article is about?
Get at least 2 walkie talkies that are the same brand and model. Turn the radios on after charging them to full battery. Tune every radio you’re going to use to the same frequency. Turn the volume all the way up on every radio and test them. Get earpieces if you’re using radios professionally.

Problem: Article: Even if you have backup power, you should be warned that your basement does flood.  Home alarm and security companies can provide you with an alert to your cell phone or pager when your power goes out or if your basement floods. Stand alone water alarm units exist that don't require a full security system.
Summary: Get a warning system. Make sure you carry emergency contact numbers for your plumber or electrician in the event of receiving an alert.

Use a tape measure or extendable slide rule to measure the width of the window opening at the base, middle, and top. Write down the smallest of these measurements as the width. Be sure to measure from the surface of the jambs or frame, not from the short extensions that hold the window in place. A slide rule with extension may result in more accurate interior measurements. If you are using a tape measure, make sure you account for the width of the tape measure itself, which is usually printed on its label. Your window may be surrounded by a plastic or aluminum jamb liner that slots around its vertical sides. This will be removed before the replacement window is installed, so measure its width and add it to the width of the window opening. If you cannot access the liner's width to measure, use 1/2" (1.25 cm) as an approximation. From the windowsill surface closest to the window itself, measure the height to the top of the window opening. Do this at the left, center, and right edges, and write down the smallest result as the height. If your windowsill is sloped, measure from the highest point, which is usually right against your window. Measure the depth between the two stops that extend in front of the window frame. Try to measure at the shortest point, but it is not vital that you measure in three places as you did the weight and height.  If you cannot open your window, measure the depth on each side and add them together. Alternatively, approximate by measuring the depth on the interior side and multiplying by two. To the result from either of these methods, add the thickness of your glass pane if you know it. A single pane of glass varies in thickness, but 1/8" (3mm) is a reasonable estimate. There is usually a minimum depth required for installing a specific replacement window or storm window, but as long as the depth is larger than that minimum, you do not need an exact measurement. Measure the window opening from the top left corner to the bottom right corner and write it down. Measure the distance from the opposite corners (top right to bottom left) and compare with the first measurement. If these lengths are not equal, your window opening is not square or rectangular. In this scenario, you should let the manufacturer of the new windows or shutters know that the opening is "racked" and give them these measurements. Some manufacturers of replacement windows, storm windows, or exterior shutters may request that you order items slightly narrower than the size of your opening to make sure they fit. You may follow that manufacturer's instructions to reduce the size by the appropriate amount, or give them the exact dimensions of your window opening. The important point to remember is to be absolutely clear which method you are using, since if both you and the manufacturer narrow the window size, it may not fit at all.
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One-sentence summary --
Measure the width at three points and use the smallest measurement. Account for the lining around the window if present. Measure the height at three points. Measure the depth of the window if you are installing replacement windows. Check whether the window opening is rectangular. Be clear about where you measured when ordering windows or shutters.