1. Sizes: 51*46*13mm. Weight: 12g.
2. BT v5.0. Chip: Jerry JL AC6956A.
3. Battery capacity: 140mAh, charging for about 2 hours.
4. Calls / music time: 8 hours.
5. Output interface: 3.5mm.
6. Compatible for audio devices with 3.5mm input interface (car, speaker, earphones, etc.).