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| Model | J55 |
| Receiver Mode | RX mode Pair with mobile phone/MP3/Tablet, etc. transmitt music to your old car stereo/home stereo/boat/3.5mm wired headphone via 3.5mm AUX port. |
| Transmitter Mode | TX mode Pair with your Bluetooth earphones or Bluetooth speakers, and send audio from a wired headphone jack, such as an airplane, TV, PC, or treadmill at the gym, to your Bluetooth earphones/Bluetooth speakers. |
| Charging | Type-C |
| BT Version | V5.4 |
| Battery | 3.7V 150mAh |
| Call (in receiver mode pair with phone) | Build in microphone, Answer/Hang up/Reject/Redial phone calls |
| Working Time | around 7 hours |
| Charging Time | 1-2 hours |