BT2288 Mini Wireless Bluetooth 4.1 Speaker Connection Outdoor Speaker IPX7 Portable Sound Box Hands-free with Microphone USB Rechargeable

Features:
Plays wireless music from your BT-enabled audio devices. Supports hands-free calls with a built-in microphone.
Supports true wireless stereo function, two of them can connect to each other for stereo and powerful rich sound.
A rechargeable 500mAh battery offers 5 hours of playing time. BT 4.1, stable signal, more power saving.
Mini size, with a portable lanyard, you can hang it on your backpack, or just put it in your bag.
5W internal magnetic horn brings you perfect music and high-quality loud sound.
How to activate the function:
Activate true wireless stereo sound by pairing 2 L01 speakers. Turn 2 speakers on and double press the power button of one speaker, then two of them will pair automatically.