Active Noise Cancelling Headphones,Langsdom Over Ear Bass Bluetooth Headset with Mic, Bluetooth 4.2 Wireless Headphones Comfortable Earpads, 38H Playtime for Travel Work TV PC Cellphone (Black)

  • 【Active Noise Cancelling】With professional ANC technology, bluetooth headphones are effective at reducing noise on noisy subways, buses or airplanes.It keeps yourself immersed in the music world and in a good mood. Noise cancellation works well in both wired and wireless modes.
  • 【Crycal Clear Sound and Premium Call Quality】50 mm stereo drivers combined with advanced chipset deliver powerful and steady audio. Experience High-Resolution sound with AptX technology, you can definitely hear each other when you’re talking to your friends. It’s as clear as a face-to-face conversation.
  • 【Comfort Earplug 】 Bluetooth headphones come with an upgraded soft pad, 90°swiveling ear cups & extendable arm & adjustable foldable headband helping the headphones fit snugly to your head. We offer protein Earpads to wearing time with comfort all days. In addition, by folding the design, you can easily fold it into a storage box to carry or store.

Product Description

Active Noise Cancelling Headphones,Langsdom Over Ear Bass Bluetooth Headset with Mic, Bluetooth 4.2 Wireless Headphones Comfortable Earpads, 38H Playtime for Travel Work TV PC Cellphone (Black) : Product Description



What is the communication distance of Bluetooth?

Bluetooth has the concept of “Class.” Even with the same Bluetooth product, the strength of the radio wave differs depending on the class that is certified. That is, the communicable distance also changes.

Before you buy a Bluetooth product, make sure that you have the required class before purchasing so that it does not say, “The radio wave did not reach …”. There are three types of Classes 1-3.

Types of Bluetooth communication distance and communicable distance

One thing to keep in mind when choosing a product is that Class 1 devices do not always reach the maximum communication distance of 100m. For example, earphones with a communication distance of 20 m and microphones with a range of 50 m are also classified in Class 1. In other words, if the maximum output is “more than Class2 and within 100mW”, they are all equally classified into Class1.

As described above, even if the products are of the same class, the communication distance varies. If you want to focus on range, check the maximum output for each product.

Also, the intensity of radio waves that can be output differs depending on the country or region where the device is used. The upper limit is about 50 mW under the Japanese Radio Law, but not overseas. Besides, keep in mind that the distance may fluctuate depending on the performance of the receiving antenna and power amplifier, so it cannot be measured unconditionally.

How to pair Bluetooth headphones (Android / iOS)

  • step 1 Put the headphones in device registration mode (pairing mode)

Hold down the “power” button or “PAIRING” button on the headphones until the lamp on the central unit blinks (about 7 seconds).
There are the following two patterns for the lamp blinking.

The blue lamp blinks twice each time
Blue and red lights flash alternately
Refer to the instruction manual as it varies depending on the model.

  • Step 2 Turn on the Bluetooth of the smartphone or tablet you want to connect

For Android
Select [Settings]-[Wireless & Networks]-[Bluetooth].
For iOS
Select [Settings]-[Bluetooth]

  • Step 3 Touch the displayed headphone model name on the smartphone or tablet screen.

* If you are asked for a passkey, enter “0000 (Zero Zero Zero Zero)”.
A passkey is sometimes called a passcode, PIN code, PIN, password, etc.

The pairing is completed.

How to pair your computer with a Bluetooth device such as headphones, a mobile phone, or another computer.

  1. In Windows, search for and open Bluetooth and other devices.
    NOTE: If you don’t return any results in Bluetooth and other devices, your computer may not support Bluetooth.
  2. On the “Bluetooth and other devices” tab, change the Bluetooth setting to “On.”
  3. Click Add a Bluetooth or other device to start searching for tools.
  4. Click [Bluetooth] as the type of device to add.
  5. Select the Bluetooth device you want to add from the list.
  6. When prompted, enter your PIN and click Connect. If you don’t see the PIN, enter the default PIN ” 0000 ” often used for Bluetooth devices.
  7. Review the authentication message for the device you are connecting to now and approve the news or grant access.
  8. Follow the instructions on your computer and device to complete the pairing process. A confirmation message appears when the device is paired.

NOTE: If you see an authentication error, it’s too long. Move the device closer and try pairing again.