THE SYSTEM
 
The system is comprised of a transmitter unit, which connects to your audio source (typically a mixer or sound interface); and a belt-pack receiver, to which you connect your earphones or headphones.
 
LOUD AND CLEAR'
 
The U4 system features high-resolution, 24-bit / 48 kHz audio, with a very wide and smooth frequency response between 20 Hz and 20 kHz, a signal-to-noise ratio of 107 decibels, and more volume than you’ll ever need. The sound is better than CD quality, and much, much better than MP3 quality!
 
LONG, EASY CHARGE
 
The internal battery in both the transmitter and the receiver lasts for 5 hours. The battery is easily charged using the included USB cable and any standard 5V USB charger, and charging takes between 1.5 and 2.5 hours depending on the current of the charger being used.
 
Specifications
 
WIRELESS TYPE
2.4 GHz ISM worldwide open band
BIT DEPTH/SAMPLE RATE
24-bit / 48 kHz
SWITCHABLE CHANNELS
6
SIMULTANEOUS CHANNELS
6
FREQUENCY RESPONSE
20 Hz – 20 kHz (-3dB)
DYNAMIC RANGE
107 dB (-3 dB)
SIGNAL-TO-NOISE RATIO
107 dB
STEREO/MONO
Mono
TOTAL HARMONIC DISTORTION
0.2%
LATENCY
5 ms
OPERATING RANGE
27.5 m / 90 ft (line-of-sight)
TRANSMITTER
 
INCLUDED
U4T
CONNECTOR
XLR or mono unbalanced 1/4” TS with supplied adapter
DIMENSIONS
100 x 30 x 28 mm / 3.8" x 1.2" x 1.1"
WEIGHT
90 g / 3.17 oz
RECEIVER
 
INCLUDED
U4R
HEADPHONE OUTPUT
3.5 mm / 1/8"
DIMENSIONS
60 x 47 x 41 mm / 2.36" x 1.85" x 1.61"
WEIGHT
118 g / 4.16 oz
BATTERY
 
TYPE
Rechargeable Lithium-ion (internal)
BATTERY LIFE
5 hours
CHARGING TIME
2.5 hrs (full charge)
CHARGING VOLTAGE
5V (USB)
USABLE WHILE CHARGING
Yes