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  4. DSPPA DSP2021B 2.4G Wireless Teaching Audio System for Classrooms, Anti-Interference
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DSPPA DSP2021B 2.4G Wireless Teaching Audio System for Classrooms, Anti-Interference

  • Stylish and simple appearance design.
  • Adopt PLL design, with infrared and wireless frequency pairing functions.
  • Automatically search interference signals in the current environment, and actively avoid interference frequencies and select an ideal channel.
  • Adopt international top high-performance audio processing chip, ultra-low distortion sound processing circuit design.
  • Dynamic compression shunt technology, to shunt and load high and low frequencies automatically for the best performance.
  • Adopt international advanced digital pilot technology and independent ID code design to prevent cross frequency.
  • Easy to install and use.
DSPPA
Price
⃁ 553.01 ⃁ 553.01 ⃁ 691.26
(Tax excluded)
Ask on WhatsApp Quote for quantities
  • Delivery within 2–5 business days across Saudi Arabia
  • Warranty according to the manufacturer
  • Tax invoice with every order
  • Technical support before and after purchase

Not sure this model fits your setup? Read the buying guide

Documents
data-sheet-dsp2021a-dsp2021b-2.4g-wireless-microphone-system.pdf

Technical Specifications – DSP2021B

Voltage5V
Working Current (Peak)80mA
Standby Current0.1mA
Receiver Dimensions (W×D×H)165×105×30.4mm
Receiver Net Weight0.2kg
Bit Depth16Bit
Sampling Rate48kHz
Frequency Response100Hz-10kHz@±3dB
Distortion<0.4%@94dBSPL, 1kHz
S/N Ratio83dB
System Delay15Ms
Full-Scale Input190mVrms
Full-Scale Output960mVrms
Input/Output Gain Ratio14.1dB
Frequency Selection MethoodMenu switching
Data Rate2Mbps
Transmit Power>10dBm
Maximum Working Distance10M
Charging5V-800mA~2A power adapter
Operating Temperature-20~60℃
Storage Temperature-20~60℃

Source: DSPPA official website. Specifications are subject to change by the manufacturer.

PRACTICAL ANSWERS

IP phone questions

How do I choose an IP phone for an employee?

Start with the person’s daily call workflow, required keys, headset use and desk connectivity. Check the exact model against the PBX and provisioning method rather than selecting only by screen size or appearance.

Does an IP phone need a separate power adapter?

Check the phone’s supported power options, what is included in the package and the capabilities of the connected switch. Confirm that the complete proposed arrangement can power every phone, not just a single test device.

Will my headset work with the new phone?

Compare the headset and phone model numbers, connector type and any required adapter or call-control support. Ask to test answering, ending and muting a call with the intended combination before equipping a team.

Can a phone be used by a remote employee?

Confirm the PBX’s supported remote deployment method and the employee’s network requirements. Plan secure provisioning and support responsibilities; do not expose administration interfaces or assume a phone can be moved without configuration.

How should I compare phone models for a reception desk?

List the extensions the receptionist handles, the required transfer workflow and any need for expansion keys or a headset. Evaluate the full workflow with the PBX, including the features actually licensed and supported.

What should I check before deploying many IP phones?

Test a small representative group first, then review network ports, power, provisioning, user labels and the rollback plan. Keep an inventory linking each physical device to its intended user or location.

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