The U4R Wireless In-Ear Monitor System from Xvive Audio provides performers and presenters a hands-free, cost-effective, and expandable solution that supplies 24-bit/48 kbps digital sound quality to their favorite in-ear and headphone monitors. This configuration includes a single receiver and a single transmitter; ready for plug-and-play use in a wide variety of settings including musical venues and and theatres, houses of worship, schools, corporate conference rooms, and more.

The portable, easy-to-use U4 system features road-worthy components housed in tough molded-plastic and cast-metal chassis built to handle the rigors of touring and designed to work with a huge variety of audio gear. The components are powered by internal non-replaceable batteries that offer 5 hours of operating time and are recharged via USB ports.

The transmitter works with basically any mixer or other device that has an available balanced XLR or unbalanced 1/4" output jack. Just plug the transmitter in, and it will broadcast the incoming audio to any of its six selectable 2.4 GHz channels. Simply set the bodypack receivers to the same channel and you're good to go. The system provides a 90' line-of-sight transmission range and a 5 ms latency, low enough for musical applications.

2.4 GHz Band Works Anywhere in the World    Includes One SE215 Stereo Earphones    Transmitter Plugs into XLR or 1/4" Gear    Bodypack Receiver with 3.5mm Jack    5 Hours on Built-In Rechargeable Battery    24-Bit/48 kb/s, 5 ms Latency

• Simple to use: plug in the tranmitter and set the transmitter and receiver to the same channel—that's it
• The 2.4 GHz system works anywhere in the world—ready to go where the tour goes
• The U4 receiver can work with multiple transmitters, you can add more as you need them
• The system offers 6 wireless channels to choose from, allowing you to expand the system with additional transmitters (available separately) and send different monitor mixes, specifically tailored to the needs of your performers

• The U4 offers 24-bit / 48 kb/s digital audio with a 107 dB dynamic range and a 20 Hz to 20 kHz frequency range
• Transmission range is 90' line of sight and the latency is 5 ms
• A built-in rechargeable battery powers each component for 5 hours 
• Belt clip and volume control on receivers
• Works with a wide range of in-ear and headphone monitors

• LINE MODE: Use with mixers or other professional audio devices that send line-level signals.
• AUX MODE: Use when connecting consumer audio devices such as portable audio players or computers

Related Questions and Answers

Q: 1. can I use this to talk on the phone ?

A: You will either need to get the appropriate Shure RMCE cable (available with various connector options, or a Bluetooth version. Alternativly, Shure also makes this available packaged with the Bluetooth cable. Follow this link for the various cable options as well as the version that comes prepackaged with the Bluetooth cable. https://www.bhphotovideo.com/c/search?sts=ma&setNs=p_PRICE_2%7c0&Ns=p_PRICE_2%7c0&sortType=default&srtclk=sort&N=0&Ntt=shure%20rmce

Q: 2. How many transmitters can I use simultaneously?

A: You can use up to 6 transmitters simultaneously in the Xvive Audio U4 Wireless In-Ear Monitor System.

Q: 3. Can this compatible with other Xvive wireless systems such as the U3? For example, can I use U3 transmitter with U4 receiver on the same channel?

A: Yes, according to Xvive, it is possible toa use a U3 transmitter with a U4 receiver when both units are set on the same channel. Xvive has a video posted on their Facebook page that shows the setup in use: http://www.facebook.com/xviveaudiousa/videos/can-a-u3-transmitter-work-with-a-u4-receiver-heres-live-proof-that-you-can/2287201628250839/

Q: 4. Can I put the xvive u4 on the mixer or on a speaker without the risk of it burning (as happened to me with the sennheiser ew100 g3 transmitter???)

A: The Xvive Audio U4 Wireless In-Ear Monitor System can be used with a mixer or passive loudspeaker, but it should be connected using a cable to avoid putting undue strain on the XLR connector.

Q: 5. Hi,Does this earphone fit in small Asian ear?

A: it comes with multiple fittings. the small ones will likely fit you.

Q: 6. The specs written for the blue, black and clear earbuds are all slightly different. But is there really any difference between them aside from the color?

A: No, the only difference between the blue, black and clear versions is the color. The black and clear are standard colors while the blue finish is a special edition. Specs are actually the same for all three.

Q: 7. Is the battery on the trans-mitter replaceable?

A: No, the built-in rechargeable batteries for the Xvive Audio U4 Wireless In-Ear Monitor System are not user replaceable.

Q: 8. Can you add other receivers to this system later?

A: Yes, you can add more receivers to this wireless monitoring system. .

Q: 9. Does this unit support stereo audio? I’m hoping to use it as an inexpensive way to use my in-ear monitors.

A: This unit only accepts a mono audio input.

Q: 10. Are these safe and effective at war reenactments and motor races? I want to monitor audio but block out REALLY loud noises.

A: Yes, the Shure SE215 Pro Sound-Isolating Earphones (Clear) effectively act / operate the same as ear-plugs with external noise.