General questions about UB400 and UB4A
Q1: Does UB400/UB4A support Mac and Linux?
They only support Windows OS, in which Win8/8.1/10 is plug and play, and XP/7 requires driver installation.
Note: Because of the limitation of Windows OS, if the PC has a built-in Bluetooth adapter, the customer needs to manually disable the internal Bluetooth adapter to recognize UB400 and UB4A.
Q2: What is the coverage of UB400/UB4A?
A: The barrier-free distance is 30-40 meters. But this distance will decrease with wireless interference and various obstacles such as walls.
Common wireless interferences include 2.4G interference, including 2.4G Wi-Fi, USB 3.0 devices, microwave ovens, other Bluetooth devices, etc.
Q3: Whether UB400 /UB4A supports BLE?
Q4: Whether Peripheral role is supported on UB400/UB4A?
A: In a BLE (Bluetooth Low Energy) connection, a BLE device is acting as either a central or peripheral role.
Central Role (Master): A device that initiates commands and requests, and accepts responses from the peripheral device.
Peripheral Role (Slave): A device that receives commands and requests, and returns responses.
Generally, a central role device is a computer or smartphone, while the peripheral role is usually an end device such as a Bluetooth headset.
As for UB400/UB4A, they only act as the Central Role and don't support the Peripheral Role.
Q5: What is Encryption type of UB400/UB4A?
A: SAFER+. 128bit encryption key length supported at most.
Q6: What audio code compression algorithms are supported by UB400/UB4A?
A: It supports SBC. It doesn't support APT-X or APT-X HD.
Q7: What is the power class of UB400/UB4A?
A: Class 1.
Q8: Can I change the Bluetooth MAC address for UB400/UB4A?
You may try some third-party software such as Bluetooth MAC Address Changer to change the Bluetooth MAC address of UB40/UB4A.
Q9: How many Bluetooth devices can be connected to the UB4A?
UB4A supports at most 6 Bluetooth devices but only 1 Bluetooth device can be used at the same time.
Note: TP-Link is not obligated to provide any maintenance or support for any third-party software and does not guarantee the performance and stability of third-party software. Damage to the product as a result of using third party software will void the product's warranty.
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