Features: Bluetooth version: Jerry AC7003D8 V5.32. Battery capacity: 35mAh x 2 (without protection board, headphone board lithium battery protection IC) Charging compartment battery capacity: 300mAh (with protective board) ANC noise reduction depth (4-mic call noise reduction): greater than -30dB ENC noise reduction depth (4-mic call noise reduction): greater than -40dB Novel appearance with metallic paint and cool colourful breathing lights in the charging compartment DNS call noise reduction P x 6 level waterproof/sweat-proof function Support protocols: HSP, HFP, A2DP, AVRCP Drive unit: 10mm diameter Speaker sensitivity: 110 /-3dB Speaker impedance: 32ohms Input charging standard: DC 5V Bluetooth operating frequency: 2.402GHz-2.480GHz Frequency response range: 20HZ-20000HZ Maximum transmission distance: 10M Voice prompt support Multipoint connection not supported Wearing method: In the ear Interface: TYPE-CPackage Includes: 1 x T52 Anc Tws Gaming Bluetooth Earbuds Black