1. Selecting mode must be done before power on.
2. TX or RX mode cannot be changed after power on.
3. The pairing mode will last around 2 minutes. It will turn to standby mode if there is no device can be connected within 2 minutes.
4. The transmitter can only pair with one Bluetooth device.
5. The transmitter will automatically connect to the last connected device after turn on.
6. The transmitter will automatically power off if no devices connected within 5 minutes.
7.Please use 5V standard charger to charge Bluetooth transmitter/receiver. Do not use quick charger/ flash charger/ fast charger for the output voltage is over 5V and may destroy your Bluetooth transmitter/receiver.
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h 5.0 Transmitter Receiver, BT-B20 h 5.0 Mini Transmitter Receiver HD LL Portable Wireless Audio Adapter 24 Game Time 20m Range with 3.5mm Digital Optical Toslink 2 RCA Plug Cable for Home TV Home Stereo Car Car Laptop Earphone HiFi Speaker System Sound system
There is 2-3% difference according to manual measurement.
Please note that slight color difference should be acceptable due to the light and screen.