We have some problems with your product. I need a service manual to check for potential problems, so can repair it ourselves.

Unfortunately, we do not provide technical manuals to end users, you can contact customer support for assistance.

Is it possible the speaker line-in jack can be used with a mic?

The Line-in jack cannot be used with a mic.

I have a Bluetooth device, how do I disconnect the Bluetooth with my laptop?

You can remove the pairing record from the computer/smartphone to disconnect the headset.

How long does it take to charge SP-940BT?

SP-940BT charging time usually takes two and a half hours.

What is your global warranty on your products?

Unfortunately, we do not offer global warranty on our products.