AUKEY Bluetooth Receiver V4.1 Portable Wireless Receiver Wireless Adapter Audio Equipment for Home HiFi Car Speaker System and Mobile Phone with Stereo 3.5mm Aux

Bluetooth Adapter Receiver
Bluetooth V4.1
Playtime 10 Hours
Standby 180 Hours

AUKEY Bluetooth Receiver Wireless Audio Music Adapter A2DP with 18 Hours Playtime, Bluetooth 5.0,  Hands-Free Calling and 3.5mm Stereo Jack for Home and Car Audio System

Bluetooth Adapter Receiver
Bluetooth V5.0
Playtime 18 Hours
Standby 1000 Hours

AUKEY Bluetooth Transmitter & Receiver, Bluetooth 4.1, 8 Hours Playtime, Wireless Stereo Audio Adapter Car Kit for Headphones, Speakers, TVs, Computers, MP3 Players, Phones, and More

Bluetooth Adapter Transmitter & Receiver
Bluetooth V 4.1
Playtime 8 Hours
Standby 160 Hours
Charging Time 2 Hours

AUKEY Bluetooth Transmitter Receiver 2-in-1 with 164ft Long Range, Bluetooth 5.0, aptX Low Latency, Dual Links Wireless Audio Adapter for Headphones, TVs, Home Stereo Systems, and More

Bluetooth Adapter Transmitter & Receiver
Bluetooth V 5.0
Long Range 164ft
Toslink Optical Cable yes
AUX 3.5mm yes

AUKEY Bluetooth FM Transmitter, Radio Adapter Car Kit with 3.5mm Audio Plug and USB Input for Mobile Audio Output Devices, Microphone

Bluetooth Adapter FM Transmitter
Bluetooth Yes
AUX in 3,5mm Yes
USB yes
Charging Port USB 2,4A

AUKEY FM Transmitter Bluetooth, Wireless Car Kit with Handsfree Calling and Flush Fit Dual Port 2×2.4A Car Charger for Mobile Audio Devices, Microphone

Bluetooth Adapter FM Transmitter
Bluetooth Yes
Microphone Yes
Charging Port USB 2 x 2,4A