The AGASound AGA ONE is a nicely built IEM with a 3D printed body and a metal faceplate. It looks sleek and modern. I found them very comfortable, and they provided above average isolation. The cable was actualy good as stock cables go, I found it both good looking and sturdy. the tips included were okay and provided a good fit for me.

Inside the box you will find the following
Aga One IEM
Silver-Plated OFC Cable
Three Pairs of Wide Bore Ear Tips [S, M, L]
Three Pairs of Narrow Bore Ear Tips [S, M, L]
Three Pairs of Silicone Sponge Ear Tips [S, M, L]

Specifications:
Brand: Agasound
Model: AGA ONE
Source: China
Colour: Silver
Sensitivity: 126dB
Impedance: 19 Ω 10% @1kHz
Frequency Response: 20-20kHz
Plug: 3.5 mm gold-plated plug
Driver: Balanced dual magnetic DD
Cable: High-purity silver-plated OFC

Lets get into the sound:
The AGA One Has very good quality Bass while not exactly Bass head it still has a nice Sub-Bass presence and enough depth and width to be quite enjoyable on recordings that are more Bass oriented. Mid-Bass is no slouch it too is well refined with good control and speed.
The Mids are very interesting with the vocals being centered and not pushed forward, they are far from the typical Vshaped recession but instruments in general are slightly in front of them. The Mids have good clarity and note weight is also good with above average separation and are more towards a smooth rich Midrange with decent technicals.
The treble is well controlled offering enough energy and air without overextending or harshness. The soundstage is fairly wide with less depth and height, but good imaging and it doesn't fall apart on bad recordings.

In a nutshell:
The AGA One is a under $40 IEM with good build quality and a pleasant smooth Harman tuning for a comfortable and relaxed listening session anywhere. I like the look and find it very enjoyable as an everyday use IEM.