If you're looking for a way to connect two headphones or two speakers to a single audio source, you'll need a device such as the KitSound Bluetooth headphone splitter which is essentially a Bluetooth 4.1 A2DP transmitter that connects wirelessly to an audio source, allowing you to broadcast audio to two pair of headphones or two speakers.
KitSound's Bluetooth headphone splitter comes specially handy if you own a smartphone such as the iPhone 7 that does not have a headphone jack as it allows you to connect to the iPhone 7 via Bluetooth while you're connected to the splitter.
As you're able to receive wireless audio, this means you can also turn a pair of wired headphones to wireless by using KitSound's Bluetooth headphone splitter.
KitSound's Bluetooth headphone splitter is very small and lightweight, and it's very easy to use. Simply plug it into the headphone jack of a smartphone and you'll be able to connect two wired headphones simultaneously via two 3.5 mm headphone sockets. KitSound's headphone splitter has a built-in rechargeable 150mAh battery that gives you at least 9 hours of play time.
To start using the KitSound Bluetooth headphone splitter via Bluetooth, turn the splitter on by holding the power button for several seconds, which in turn enters pairing mode automatically. Then, turn the Bluetooth on your smartphone, search for new devices and select "BT Splitter" from the list (enter 0000 passcode if requested).
The splitter will automatically pair to the last device it connected to when turned on. While charging, the LED will show solid red. When charging is complete the LED will show solid blue. Full charge takes around two hours.