Frequently Asked Questions

Please check the following steps:
1. Ensure the audio cable (Optical, 3.5mm AUX, or RCA) is firmly connected to your TV's Audio OUT port (not Audio IN).
2. If using an Optical cable, ensure your TV's Digital Audio Output format is set to PCM (not Dolby or DTS).
3. Make sure the transmitter base and headphones are both powered on and successfully paired.

Sound cutouts are usually caused by wireless interference or weak signal:
1. Keep the transmitter base at least 3-4 feet away from Wi-Fi routers or smart TV streaming sticks.
2. Ensure clear line-of-sight between the transmitter and headset.
3. Verify that the headset battery is sufficiently charged.

1. Check the Balance Control dial on your headset (available on SM-824D1 / SM-823D) to ensure it is centered between Left and Right.
2. If connected via 3.5mm AUX cable, ensure the plug is fully pushed into the jack.

1. Ensure the power adapter is firmly connected to a working wall outlet.
2. Clean the metal charging contact pins on both the headset and the charging dock with a dry cotton swab to remove dust or grease.
3. Ensure the headset is aligned and securely placed in the charging slot until the charging indicator lights up.

1. First, turn up the volume knob directly on your SIMOLIO headset.
2. Check your TV's audio settings: make sure the TV's headphone/optical output volume is set to a high level (or fixed volume mode).
3. If using an optical connection with a set-top box or streaming stick, increase the volume on that box's remote as well.

1. If you are connected via 3.5mm AUX, reduce the TV output volume slightly to prevent input signal clipping, then adjust the headset volume.
2. For optical connection, confirm your TV audio output is set to PCM / Stereo.
3. Check if the battery level is low and recharge the headset.

• Solid Green / Blue: Powered on and paired successfully.
• Flashing Green / Blue: Searching for connection or in pairing mode.
• Red: Headset is currently charging.
• Light Off: Fully charged or powered off.

SIMOLIO 2.4GHz wireless TV headphones operate on dedicated ultra-low latency technology (under 30ms), eliminating noticeable lip-sync delay. If you experience delay, check if your TV has an 'Audio Delay' or 'Lip Sync / A/V Sync' adjustment setting and set it to 0ms.

You can find downloadable PDF user manuals and quick start guides for all SIMOLIO models on our Manuals & Downloads page.