Guangzhou FiiO Electronics Technology Co., Ltd.-AIR AMP

ECHO NANO

M33 R2R

M27

M15S

M23

JM21

M21

ECHO MINI

DISC

Q15

Q7

Q3-MQA

Q11

RETRO NANO

BTR17

BTR11

BTR13

BTR15

BTR7

BTR5 2021

BTR3K

UTWS5

UTWS3

UTWS5 2025

TINY

QX13

MELODY

KA17

KA15

KA13

KA11

JA11

芥子/JIEZI

BT11

AIR LINK

ANYWHERE

DAP

DAC/AMP

Bluetooth DAC/AMP

Bluetooth ear hooks

USB dongles

Bluetooth TX/RX

Portable Speaker
GIGAS 1

AIR AMP

K17 R2R

K15

K17

K13 R2R

K11R2R

K19

R7

R9

S15

BR15 R2R

BTA30 Pro

BR13

D03K

SR11

WARMER R2R

DARKSIDE PRO

PL50

EA13

LEVEL_1

DAC/AMP

Digital Streaming Player

Bluetooth TX/RX

DAC

Streaming Music Receiver

R2R DAC + tube buffer

linear power supply

Power Amplifier
OAK NANO

FD15

FD7

FD3/FD3 Pro

JD7

FD1

JD1

FD11

JD10

FA7S

FA19

FX15

FX17

FH19

FH11

LUMI

FH3

FH9

FH7S

FH5s/FH5s Pro

JH3

JH5

JF11

FF5

FF3

FF1

FF3S

JT9

JT7

FT13

FT7

FT5

FT1

FT1 PRO

JT1

JT3

FG3

FW3

FW5

JW1

FP3

Dynamic Driver IEMs

Balanced Armature IEMs

Tribrid Driver IEMs

Hybrid IEMs

Earbuds

Over-Ear Headphones

Gaming headset

TWS Earphones

Planar IEMs
SP5

SA1

SP3/SP3 BT

RETRO BOX

Active speakers
CP13

TT13

TT11

RR13

RR11

DM13

DM15 R2R
KB3

HiFi Keyboard

AIR AMP

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General Specifications
Name/Model	LINK TWS(UTWS17)	Hardware Scheme	DAC: AK4333 * 2 Bluetooth decoding: QCC5181 * 2
Color	Black	Dimensions	about 8g × 2 (ear hanging only) about 112g (charging box only) about 128g (complete machine)
Weight	about 93.171.134.2mm (charging box)	Sampling rate support	Up to 192kHz-24bit
Bluetooth version	Bluetooth 6.0	FIIO Control	Support
Audio Decoding	SBC/LC3/aptX/aptX Adaptive/aptX lossless/LDAC/LHDC	Low-battery warning	Support
Bluetooth range	10 m	Multipoint connection	Support
Battery indicator	The charging case display shows the battery levels of both the charging case and the ear hooks.	Dual MIC call noise reduction	Support
Game mode	is on, but it will increase power consumption	Transparency mode	Support
Firmware upgrade	OTA upgrade through FIIO Control	Volume control type	Buttons
Channel balance	L12 to R12 (0.5dB per stage)	Adaptive impedance	8 ~ 100Ω
EQ	support EQ, PEQ
Buttons and Ports
Buttons	Physical buttons	Headphone output	MMCX or 0.78mm 2-pin (Both connectors are included and detachable)
Power Supply Parameters
Power Input	DC 5V ≥1A	Battery life	>7h (SBC code) / The charging case can recharge the ear hooks twice.
charging time	Ear hooks ≤2h / Charging case ≤2h
Audio Parameters
Performance and parameters of headphone output
Output power	≥55mW(16Ω / THD+N<1%)	Output impedance	<0.9 Ω(32 Ω)
Output power	≥85mW(32Ω / THD+N<1%)	Crosstalk	≥ 90dB (1kHz/32Ω)
Noise floor	≤ 4.9 μV(A-weighted)	THD+N	<0.0020% (1kHz/-3dB/32Ω)
Frequency response	20Hz ~ 40kHz: attenuation <2.5dB	SNR	≥ 111dB (A-weighted)
Peak output voltage	>5Vp-p

Test conditions: LDAC codec, -3dB sinusoidal signal, 48kHz 20Hz–20kHz, headphone out (32Ω load)