LD Systems U504.7 HHD | Wireless Handheld Mic System | 470490 MHz with OLED Display

Wireless Handheld Microphone System

LD Systems U504.7 HHD is a professional UHF wireless microphone system designed for reliable vocal performance in demanding environments. It includes a dynamic handheld transmitter and a true diversity receiver, along with a durable protective case for safe transport and storage.

LD Systems U504.7 HHD Competitive Differences

• True diversity receiver with high-contrast OLED display


• Switchable RF power up to 30 mW for extended range (over 100 meters)

LD Systems U504.7 HHD Description

The LD Systems U504.7 HHD brings German-engineered wireless technology to live performers, speakers, and venues needing dependable signal clarity. With its true diversity design and pilot tone squelch, the system minimizes interference and signal loss even in RF-dense environments.

The included handheld mic features a cardioid dynamic capsule optimized for vocals, delivering a smooth 60 Hz to 16 kHz frequency response. Its shock-mounted capsule reduces handling noise, and interchangeable heads allow for future customization. An automatic frequency scan makes setup fast and frustration-free, while one-touch IR sync pairs the transmitter and receiver instantly.

The OLED screen displays frequency, group/channel info, battery level, and signal strength in real time, making live monitoring simple. With selectable transmission power (2, 10, or 30 mW), this system adapts easily to small rooms or large stages. Power-efficient circuitry ensures over 10 hours of performance on just two AA batteries.

To make transport even easier, this package also includes a custom-fitted protective case with foam inserts ideal for performers on the go.

Model Features

• UHF wireless system operating in 470490 MHz (USA only)


• True diversity receiver prevents signal dropouts


• Dynamic cardioid microphone with shock-mount and interchangeable capsule


• 96 channels (8 groups of 12)


• OLED display on both mic and receiver


• Pilot tone squelch and IR frequency sync


• Switchable RF output power: 2 / 10 / 30 mW


• Up to 10 hours of runtime on 2 x AA batteries

Model Specifications

• Transmission Frequency: 470490 MHz


• Channels: 96 (8 groups of 12)


• Microphone Type: Dynamic, cardioid


• Frequency Response (Mic): 60 Hz 16 kHz


• Receiver Frequency Response: 30 Hz 16 kHz


• S/N Ratio: >95 dB (mic), >100 dB (receiver)


• Distortion (THD): < 0.1%


• RF Output Power: 2 / 10 / 30 mW (switchable)


• Operating Time: >10 hours (2 x AA batteries)


• Mic Dimensions: 10.1 x 2 in (257 x 51 mm)


• Mic Weight: 0.55 lb (0.25 kg)


• Receiver Dimensions: 19 x 1.75 x 7.9 in (484 x 44 x 200 mm)


• Receiver Weight: 4.5 lb (2.05 kg)

What's In The Box

• Handheld dynamic microphone


• True diversity receiver


• 2 x antennas


• Audio cable


• Power adapter


• Protective carrying case with foam inserts