Energy Sistem Serenity Bluetooth earphones ANC

Audio ANC - Noise reduction: -30 dB Speaker diameter: 10 mm Type: Dynamic Impedance: 32 Ω Latency: 200 ms Frequency response: 20 Hz ~ 20 KHz THD (< 1%): Yes ANC - Frequency band: 20 Hz ~ 1 KHz Connectivity Voice assistant (Google, Siri): Yes Bluetooth version: 5.4 Bluetooth - Class: 2 Bluetooth - Frequency band: 2.4 GHz Bluetooth profiles: A2DP / AVRCP / HFP 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: 40 mAh Voltage: 3.7 V Battery life - Normal use: 5 h Battery life - ANC ON + MUSIC ON: 5 h Charging time: 1 h Charging case: Yes Type (charging case): Li-Po Capacity (charging case): 500 mAh Voltage (charging case): 3.7 V Battery life (charging case): 20 h