Can I also use (Bluetooth®-)speakers instead of headphones with the eSense?

The (Bluetooth®-)speakers are blocked by Android and iOS when the eSense is plugged into the smartphone or tablet. There are two solutions to use external speakers:

You can simply plug in normal speakers via cable into the headphone jack of the eSense. We recommend the Bose® Companion 2 Serie III Multimedia Lautsprechersystem: https://amzn.to/2Nmvw9d.

You can also plug in a Bluetooth® Transmitter (f.i. https://amzn.to/3BP4djt) into the headphone jack of the eSense and hence connect Bluetooth® speakers. We recommend the Anker SoundCore 2 Bluetooth® Lautsprecher: https://amzn.to/3zxG5iM. This solution has been tested by us with the named products and works for 100% without latency.