This spring speaker somehow recall the X-Mini Capsule Speaker because of the similarity in the shape.
This USB Powered Spring Speaker is very practical and it’s a lightweight mini stereo speaker with spring design. It offers a small but sufficient of audio power of 2W x2. You can use it on your travel since it’s very lightweight and suitable for any portable media devices with 3.5mm audio input option.
The built-in battery is Li-ion type with up to 4 hours of continuous playback time in one charge. Spring Speaker will be available at $23+ (£15).