What's in the box:

T11 BT 5.0 Audio Receiver Transmitter with 3.5mm LCD Screen 3.5 AUX Stereo USB Plug Wireless Adapter for Car PC TV Headset (Standard)

Features:
BT 5.0 Chip Intelligent chip, stable transmission without stuttering, faster and more stable.
RX+TX 2-in-1 Design Receive RX + transmit TX 2-in-1design, long press left and right function key to switch modes.
Visual DisplayPaire device name listed on the display, more intuitive and convenient to use.
Plug and PlayNo driver needed, BT fast matching connection, switch in one second.
High Quality SoundBuilt-in AEC recoiling and ANC anti-noise circuits to restore pure sound quality.

Specification:
Model: T11
Interface: 3.5mm/USB
Wireless Type: BT
BT: V5.0
Material: Plastic
Color: Black
Content: AUDIO High Definition
Sound Track: Double Sound
Track: 7.1
Transmission Distance: 10m / 33ft
Charging: Micro USB 5V / 0.5A
Transmission rate :5(Mbps)
Frequency of operation :2.4(MHz)
Item size:6.2*2.5*1.33cm / 2.44*0.98*0.52in(L * W * H)
Item weight: Approx.20g /0.71oz
Package size:12.1*6.7*1.8cm / 4.76*2.64*0.71in(L * W * H)
Package weight:32g /1.13oz

Packing list:
1 *BT Receiver Transmitter
1 *3.5mm Audio Cable
1 *User Manual