Won the official Bluetooth 5.3 certification to ensure the best compatibility, and the product has obtained international safety certifications such as CE and RoHS Using the latest Bluetooth 5.3 technology, the product has low latency, stable and continuous, and reduces intermittent advantages Supports the latest Environmental Noise Cancellation (ENC) technology to improve call quality and clarity of voice messages Support four microphone peak design, with ENC technology, can greatly reduce background noise Clear sound quality, heavy bass Equipped with 4 Microphone designs, with ENC technology, can greatly reduce background noise In-ear design for a comfortable fit Use with the charging box to provide up to 18 hours of battery life Automatic pairing of left and right earphones Compatible with Android / iOS devices After pairing for the first time, one lift automatically connects the device Equipped with a small charging box, the earphones can be charged immediately The headset can be used for up to 6 hours when fully charged With the charging box, provide up to 15-18 hours of battery life In-ear design, comfortable to wear Capacity: 250mAh for charging case / 40mAh for each earphone Headphone volume: 33.8 x 19.7x 23.7mm Weight: earphones 8g (2pcs) ; charging case 36g