The SMS Audio SYNC by 50 user manual provides setup, pairing, charging, safety warnings, and specifications for the in‑ear wireless earphones.
This manual introduces the SYNC by 50 in‑ear wireless earphones, describing the packaging contents, button functions, and how to operate the device safely. It also covers charging procedures, Bluetooth pairing, and IPX4 water‑resistance details.
Key specifications such as Bluetooth 4.0 with CSR8645 chipset, APTX support, 20‑20,000 Hz frequency response, up to 8 hours of playback, and a 250‑hour standby time are listed, along with battery and power information. This manual is written in Chinese.
| Bluetooth version | 4.0 |
|---|---|
| Chipset | CSR8645 |
| APTX support | Yes |
| Supported protocols | HSP, HFP, A2DP, AVRCP |
| Frequency response | 20‑20,000 Hz |
| Wireless range | 10 m (30 ft) |
| Audio playback time | 8 hours |
| Standby time | 250 hours |
| Charging time | 2‑3 hours |
| Battery type | Rechargeable Li‑ion (5.0 × 2.0 × 35 mm) |
| Power consumption | 50/100 mW |
| Water‑resistance rating | IPX4 |
Place the earphones within 30 cm of the device, then press and hold the multifunction button for about 5 seconds until the red and blue LEDs flash, indicating pairing mode.