Energy Sistem Urban Beat Bluetooth earphones

Audio Speaker diameter: 10 mm Type: Dynamic Frequency response: 20 Hz ~ 20 kHz THD (< 1%): Yes Connectivity Voice assistant (Google, Siri): Yes Bluetooth version: 5.3 Bluetooth - Class: 2 Bluetooth - Frequency band: 2.4 GHz Bluetooth profiles: A2DP / AVRCP / HFP / HSP Bluetooth range: 20m Compatible Bluetooth codecs: AAC / SBC Bluetooth - Maximum output power: < 20,00 dBm TWS technology: Yes Battery Charging system: USB type-C Type: LiPo Capacity: 35 mAh Voltage: 3.7 V Battery life - Normal use: 5 h Charging time: 1 h Charging case: Yes Type (charging case): Li-Po Capacity (charging case): 300 mAh Voltage (charging case): 3.7 V Battery life (charging case): 17 h Charging time (charging case): 1.5 h Microphone : Hands-free: Yes Microphone - Type: Built-in Microphone - Sensitivity: -42 dB ±