With Two Speakers With 3.5mm, Lightning and Type-C plugs Color: Black Materials: ABS Weight: 15g Response Frequency: 20Hz-20KHz SNR: >64dB Microphone Battery Capacity: 70mAh Receiver Battery Capacity: 120mAh Working Time after Charging: About 4-6 hours Charging Time: About 1.5 hours Plug and Play Frequency: 2.4GHz Transmission Range: 15-20 Meters Compatible with cameras, iPhone and other smartphones with Type-C