Energy Sistem Style pocket Bluetooth earphones

Audio
Frequency response: 20 Hz ~ 20 kHz
Driver diameter: 6 mm
Type: dynamic

Connectivity
Bluetooth® 5.1 (class 2) wireless technology.
Frequency band: 2.4 GHz
Maximum output power: < 20.00 dBm
Compatible Bluetooth profiles: HSP / HFP / A2DP / AVRCP
Compatible with SBC codecs
Up to 20 m distance range
True Wireless function with auto-pairing
Hands-free function
Voice assistant compatible with Google/Siri

Microphone
Type: built-in microphone
Sensitivity: -42 dB ± 3 dB (@1 kHz)
Frequency response: 100 Hz ~ 10 kHz

Battery
Earbuds:
Capacity: 25 mAh (each earbud) / 3.7 V
Type: lithium-polymer battery
Battery life at medium volume: 4 hours*
Charging time: 1.5 hours
Charging method: charging case

*This value is approximate. The battery life depends on the selected volume and the type of music.

Charging case:
Capacity: 150 mAh / 3.7 V
Type: lithium-polymer battery
Extra battery life: 8 hours*
Charging time: 1.5 hours
Charging port: microUSB