It is said that many people who have bought an iPhone can have one advantage, that is, they keep changing the phone case. Of course, there are also some phone cases with functions, such as the ones with mobile power. After all, the power of the iPhone is too small, but the thickness has greatly increased. After the launch of the iPhone 7, people have encountered another problem, the headphone interface has been canceled, Although Bluetooth headsets have become very popular, many people do not have Bluetooth headsets or headphones with Lightning interface, so they still need adapters urgently.

But the adapter is very easy to lose. So how to solve this problem is also a problem. Fortunately, there is a mobile phone case that can accomplish this mission. It is the CoCase mobile phone case of Demon Lover.

Now let's take a look at the CoCase packing box, which is very simple, with a total of 4 But the arrow above the color doesn't mean anything. It depends on the label pasted on the side. My model is frosted black.

Open the box cover, you can see the instructions and the phone case packed in plastic bags. Take out the phone case first.

Take a closer look at the phone case. It's frosted and feels good.

There is flannelette inside to prevent the phone from being polished, especially when it is bright and black. It must be well protected.

After a careful look, the workmanship is very good. There are two holes on the top, one is the Lightning interface and the other is the 3.5mm interface. The Lightning interface is used to charge the phone case. Most of the other phone cases that need to be charged also use the Micro USB interface. There are very few cases that use the Lightning case. This is a convenient line.

Look at the back. There are three buttons in the middle, the power button in the middle and the volume button on both sides.

The battery pack is small, so it is very thin. Compared with the ordinary pu phone case, this is the UGA all around phone case. This phone case is very thin.

The weight is only 37 grams, which is very light.

After putting on the shell, there is nothing strange. It is just a little prominent. Generally speaking, it is very good. It feels great too.

When charging, a blue LED light on the back will light up. If it is used, it will flash blue and green alternately.

Plug in the headset and you can use it immediately. It's really convenient.

After looking at the appearance, let's see how to use it again. It's a phone case. In fact, it has a built-in Bluetooth chip. In fact, this phone case is a Bluetooth headset, so we need to enter the phone settings first to find Bluetooth. Then according to the instructions, press and hold the switch for 5 seconds to enter the pairing mode, and then the phone starts searching.

Found, connection. ok， success. You can see that the quick music interface has the device name of the phone case.

You can also play, pause, increase or decrease the volume and cut songs by using the following three buttons, which is very convenient.

Since the mobile phone case is a Bluetooth headset, we must talk about the sound quality. If we talk about the sound quality, I feel that it is OK. I use the AKG A77 headset, which tends to monitor the style. For example, Zhao Lei's "Chengdu" voice is slightly low. When the drum beats in the later part, I also feel that the low frequency is very powerful, which reflects the characteristics of the headset, So there is absolutely no problem with daily use. However, one of the disadvantages of this headset is that it can be cut by double clicking the volume button. The first step is to increase or decrease the volume. If you cut songs several times in a row, the volume will either become very large or very small. This is very depressing, so I hope that future products can improve this problem. In general, this CoCase is really a phone case that all iPhone 7 users can own.

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