ABRAMTEK Headphone Amplifier Bluetooth Receiver, Portable Audio Enhancer Amp for Earphone Headset Speaker, Wireless 3.5mm Adapter for Home Car Stereo Sound System, Metallic Gray

Weight 2.31oz, diameter 1.96 inches thicken 0.51in makes it ultra portable.
Portable for anywhere, use it at home, travel, car, party, camping, beach.

Widely Compatible

Streaming music/sound from iPhone, Android phones, iPad, tablet, laptop, TV, etc.
Line out with headset, earphone, and any traditional or Bluetooth speaker.

Input: All audio players with Bluetooth and computer/laptop.

Output: Any earphone/headset, speaker and car AUX.

*Note: If your output side is Bluetooth speaker, pair your BT device with Tunner Master first, then connect the Tuner Master with speaker via 3.5mm AUX cable.

Specification

Working Voltage: 3.7V
Battery Capacity: 300mAh
Charging Voltage: DC 5V
SNR: ≥95dB
Distortion: ≤0.5%