What's in the box:

BT 5.0 2-in-1 Audio Adapter with LCD Visual Display BT Receiver&Transmitter Adapter 8 devices Dispalyd/Wide Compatibility Black (Standard)

Features:
BT 5.0 Chip With intelligent chip, it offerts stable transmission without stuttering, faster and stabler.
RX+TX 2-in-1 Design Receive RX + transmit TX 2-in-1design, free to switch to fulfil your different needs.
Visual DisplayWith max 8 names of waiting-for-matched devices listed on the display, more intuitive and convenient to use.
Plug and PlayNo driver needed, easy to use.
Portable DesignIt is small and portable, easy to carry in your backpack or laptop bag.
Strong CompatibilityThis receiver and transmitter adapter can be widely used on your computer, laptop, home stereo system, headphone, smartphone, MP3 player, CD player, etc.

Specification:
Product name: BT adapter
Input voltage: DC/5V
BT version: BT 5.0
Input interface: 3.5mm audio cable
Wireless profile: V5.0 EDR, A2DP,HSP,AVRCP
Operating range: Up to 10 meters in open area without any obstruction
Item size: 8.2*2.94*1.33cm / 3.23*1.16*0.52in(L * W * H)
Item weight: Approx.16.5g /0.58oz
Package size: 10.3*6.9*1.8cm / 4.06*2.72*0.71in(L * W * H)
Package weight:39g /1.38oz

Packing list:
1 * Wireless Receiver&Transmitter Adapter
1 * 3.5mm Audio Cable
1 * User Manual