Specifications
brand: huawei
model: freebuds pro 4
type: in-ear true wireless stereo (tws) earphones
acoustic architecture: dual driver (11 mm dynamic driver + planar diaphragm driver)
frequency response range: 14\text{ hz} - 48,000\text{ hz}
audio codecs: l2hc 4.0, ldac, aac, sbc
connectivity: bluetooth 5.2 (supports dual-device smart connection)
sensors: bone acoustic sensor, infrared, gyroscope, accelerometer, hall, touch & pressure sensors
water resistance: ip54 dust and splash resistant (earbuds only)
battery capacity: 55 mah per earbud / 510 mah charging case
wired charging input: usb type-c (5\text{v} = 0.5\text{a} or above)
wireless charging: supported (up to 5w)
weight: ~5.8 g per earbud / ~47 g charging case
color: grass green
condition: brand new (factory sealed)