•With Bluetooth-compatible 5.3 chip, faster transmission speed, longer transmission distance, stable and anti-interference •Comfortable to wear, with stereo sound, supports high-definition music •Low latency, low power consumption, long battery life, stable quality •Small and compact transparent charging case with LED digital display, unique and stylish Specification: •Model: E90 •BT version: 5.3 •Frequency response: 20Hz-20KHZ •Sensitivity: -42dB±2dB •Music time: about 4-5H(80%) •Headset battery capacity: 30mAh •Charging bin battery capacity: 250mAh •Charging interface: Type-C •Speaker unit: 13mm Package included: •1 x Pair of Bluetooth-compatible Earphones •1 x Charging Case •1 x English and Chinese User Manual