Specification:

Bluetooth version: V4.1
Frequency Range: 2.4GHz-2.48GHz
Bluetooth distance: W/O obstacles ≤10m(barrier-free space)
Standby: 120hours
Music Play/Talk Time: Up to 4 hours
Charging Time: About 2 hours
Support Agreement: A2DP, AVRCP, HSP, HFP
Frequency Response: 20Hz-22kHz
Working Environment: -10 to 50 C
Bluetooth mode: Hands free

4 Colors: Yellow, Blue, Orange, Pink. (Mix color is OK)

Package List:
1 * Syllable D300
1 * USB Cable

3 * Earbuds
1 * Instruction Book