Ugreen HiTune T1 Wireless Earbuds with 4 Microphones

HUAWEI FreeBuds 4i true wireless stereo (TWS) earbuds - Plus Cover

HUAWEI
FreeBuds 4i earbuds are true wireless stereo (TWS) earbuds consisting
of left and right earbuds and a charging case and feature an in-ear
design for increased comfort when being worn. The HUAWEI FreeBuds 4i
earbuds can be connected with other devices such as phones, tablets, and
PCs over Bluetooth to make voice calls and play music. Featuring a 10
mm-diameter dynamic driver unit, two microphones for environmental noise
cancellation during calls, feedforward active noise cancellation (ANC),
and Awareness mode, the HUAWEI FreeBuds 4i earbuds achieve crystal
clear audio delivery. With a low power solution and 55 mAh battery, the
HUAWEI FreeBuds 4i earbuds have a long battery life and a fast charging
speed via the charging case.

Hardware Specifications
External model 
Earbuds model: T0001 
Charging case model: T0001C 
Hardware platform for earbuds 
BES2500Z

Bluetooth version 
Bluetooth 5.2, backward compatible

Bluetooth protocol 
A2DP 1.3, Hands-free protocol (HFP) 1.7, AVRCP 1.6, RFCOMM 1.2, SPP 1.2, AVCTP 1.4, and AVDTP 1.3

Bluetooth name 
HUAWEI FreeBuds 4i

Hardware platform for charging case 
Third-party MCU

Charging the case 
Charged via a USB Type-C port and a cable

Charging the earbuds 
Charged via the charging case 

Charging time 
Full charge for the earbuds: around 1 hour 
Full charge for the charging case (without the earbuds inside): around 1.5 hours 
Data comes from Huawei lab tests. 
Battery capacity and type 
Earbuds capacity: 55 mAh (minimum value) 
Charging case capacity: 215 mAh (minimum value) 
Battery type: Lithium-ion polymer battery 
Music playback/Voice call duration 
Music playback duration: 10 hours (with noise cancelling disabled)/7.5 hours (with noise cancelling enabled) 
Voice call duration: 6.5 hours (with noise cancelling disabled)/5.5hours (with noise cancelling enabled). 
Huawei
conducted tests with a prototype of the HUAWEI FreeBuds 4i earbuds and
the accompanying software using the HUAWEI P40 phone. 
Music playback
test: The earbuds were connected to the phone over Bluetooth for music
playback in the AAC format with the volume set to 50%. The battery was
completely discharged until the music stopped playing from one of the
earbuds. 
Voice call test: The earbuds were connected to the phone
over Bluetooth with the volume set to 50%. A voice call was then
conducted until the voice could not be heard from one of the earbuds. 
The battery life will vary depending on the device settings, usage, and other factors. 
Standby time 
Standby time with the earbuds fully charged, connected with a device, and outside the charging case: 2 days.

Button 
A button is on the charging case.

1. Power on the case: When using the charging case for the first time, press and hold the button for 2 seconds. 

2.
Enter Pairing mode: Open the charging case and leave the earbuds
inside, then press and hold the button for more than 2 seconds. 

3.
Restore the earbuds to their factory settings: Open the charging case
and leave the earbuds inside, then press and hold the button for more
than 10 seconds. This will clear all pairing data. 

4. Reset the charging case: Press and hold the button for more than 16 seconds. 

Indicator 
The indicator outside the case provides information about the charging case by turning red, yellow, green, or white.

1. Battery level of the earbuds 
2. Pairing status 
3. Factory reset status 
4. Charging status of the charging case 
5. Battery level of the charging case

Input power of the charging case 
5 V/1 A

Number of full charge times 
When
the charging case is fully charged, it can provide at least 1 full
charge for both earbuds or at least 2 charges for a single earbud.

Effective bandwidth frequency for music playback 
20 Hz to 20,000 Hz 

A2DP decoding format 
AAC and SBC

Speaker 
Each earbud has a 10 mm-diameter dynamic driver unit

Microphone 
Each
earbud has two MEMS microphones that support uplink environmental noise
cancellation for calls and feedforward active noise cancellation.

Color (earbuds and charging case) 
Ceramic White

Weight 
Single earbud: about 5.5 g 
Charging case: about 36.5 g 
Dimensions (H x W x D) 
Earbud: 37.5 mm x 23.9 mm x 21 mm 
(including ear tips in size M that are installed on the earbuds by default) 
Charging case: 48.0 mm x 61.8 mm x 27.5 mm 
Temperature 
Operating temperature: 0C to 35C 
Charging temperature: 0C to 45C 
Storage temperature: 20C to +45C 
Certification 
The product has obtained SRRC, CE, and Bluetooth certifications.

What's in the box
Earbuds 1 pair (left and right earbuds)
Ear tip 3 pairs (Available in large, medium, and small. The medium size is pre-installed on the earbuds.)
Charging case x1
Quick Start Guide x1
USB-C cable x1
Cover x1