* 1536 Airoha chipset, very good at stability and compatibility.
* With Rigid-Flex PCB, the purpose is to reduce welding wire and achieve product consistency and stability.
* LED display earphones and charging case battery. Looks very technological.
* With 2600 mAh charging case as power bank
The TWS earbuds are really cool. The case charges with a USB-C power cable. It took me 1-2 hours to go from 0 to 100 percent. The battery life is displayed right on the case; no need to guess how much is each LED light. After the case and earbuds are charged, you open the case and search for them on the bluetooth setting on your phone. Once paired, if they disconnect they automatically connect to your phone. All you have to do is take them out of the case and they connect to your phone. If you put them back into the case, they will be charged and ready for next time you need them. If they are fully charged, they should last 4-5 hours. The battery case can fully charge them about 4-5 times. The music quality was pretty good. I went through about 3 other wireless earbuds and this was the top in music quality. The bass is pretty good as it doesn't overtake the sound. I used them a few times for calls and the other person said i sounded good. Call volume is pretty loud, which is great especially when you're outside. I'm not sure if they're are airpod killers but i rather buy these are save the extra money.
---Iris Wei
Factory's nameU-Air4
ChipsetAiroha AB1536U
Bluetooth version5.0
Distance between earbuds5 m
BT Distance15 m
Bluetooth profileHSP/HFP/AVRCP/A2DP
Noise cancellingPassive
Frequency Range100-10K Hz
Drive dimension6 mm
MIC Sensitivity42 + 3 dB
Driver Sensitivity99卤3dB
Battery Capacity earphone35mAH
Battery Capacity charging case2600mAH
Battery type earphoneLi-Polymer
Battery type caseLi-ion 18650
Input portType C
Charging time1.5 H
Working time4-6H (60% volume)
Stand-by timeAbout 70 hours
Dimension of earphoneL25.5*W19.4*H26mm
Dimension of charging boxL89*W53mm*H31.8
Weight earphone4.6g*2pcs
Weight charging box103.5g
Dimension with packageL110*H43*W110mm
Weight with package203gChina TWS Earbuds