1. BT version: v5.3. Chip: Jerry AC6965E. 2. Supported protocols: A2DP, AVRCP, HFP. 3. Transmission distance: 10m. 4. Transmission frequency: 2.4GHz. 5. Speaker unit: 2 × 4Ω5W 45mm speaker. 2 × low frequency diaphragm. Maximum output power: 10W. 6. Frequency response: 120Hz – 18000Hz. 7. Signal-to-noise ratio S/N: ≥ 90Db. Distortion THD: ≤ 5%. 8. Battery capacity: 1200mAh (Class A 18650 battery). 9. Charging input: DC 5V. Charging time: about 3 hours. 10. Use time: 3 hours (80% volume). 11. Supports BT, TF card (≤ 32Gb), USB flash drive (≤ 32Gb), FM, AUX and other modes. Supports calls. 12. With lanyard. Mini multi-color light bar. Multi-function control panel. 13. Sizes: 171.5 × 68 × 66mm. 14. Weight: 348g.