| Pair name | E90 |
| Bluetooth version | BT5.3 |
| Bluetooth profile | IFP V1.7; HSP V1.2; A2DP V1.3; AVRCP V1.6 |
| RF carrier frequency | 2402MHz-2480MHz |
| Charging current | headset DC5V-40MA charging box DC5V-300mA |
| Battery capacity | charging box 250mAh, headset 30mAh |
| Charging time | about 1h for headset and 2h for charging box |
| Listening time | about 5h |
| Bluetooth receiving distance | ≤ 15m (barrier free) |


Waterproof True Wireless ANC Earbuds Earphones are earbuds that are designed to be completely wireless, meaning that they don't have any wires connecting them to a device. They are also equipped with active noise cancellation (ANC) technology, which reduces ambient noise by generating sound waves that cancel out the external noise.