Wall-Mounted IP Speaker with Integrated 2.4G Wireless Microphone
2x20W Digital Amplifier • 3.4" LCD Display • USB/MP3 Playback • 100V Backup Input • Master/Standby Redundancy
T-7705B 2.4G WIRELESS MIC
Wall-mount IP speaker with integrated 2.4G wireless microphone. The T-7705B combines a 2x20W digital amplifier, 3.4" LCD display, and USB/MP3 playback with a built-in 2.4GHz wireless microphone receiver. Perfect for classrooms, training rooms, and small venues where a teacher or presenter needs hands-free amplification. Includes 100V backup input for life-safety redundancy.
| Model Number | T-7705B |
| Product Type | Wall-Mounted IP Speaker with 2.4G Wireless Mic |
| Display | 3.4-inch LCD (Character/Graphic) |
| Amplifier Output | 2 x 20W (stereo) @ 4-8Ω |
| Wireless Microphone | 2.4GHz digital, built-in receiver |
| Wireless Mic Range | Up to 30m line-of-sight |
| Wireless Mic Battery | Rechargeable, 8+ hours |
| Network | 10/100Mbps Ethernet (RJ45) |
| Audio Protocols | TCP/IP, UDP, HTTP, RTP, RTSP |
| Audio Codecs | MP3, WAV, PCM |
| Media Playback | USB 2.0 (MP3/WAV) |
| Audio Inputs | 1 x MIC (3.5mm), 1 x AUX (RCA) |
| Backup Input | 100V constant voltage (for analog backup) |
| Redundancy | Master/Standby switch, <0.3s failover |
| Frequency Response | 80Hz – 18kHz (±3dB) |
| THD+N | < 0.1% (1kHz, 10W) |
| S/N Ratio | > 85dB |
| Power Supply | PoE (IEEE 802.3af) or DC 24V |
| Power Consumption | ≤ 12W (without speakers) |
| Mounting | Wall mount (included), 86x86mm back box compatible |
| Dimensions (WxHxD) | 180 x 120 x 45 mm |
| Weight | 1.2 kg (including mic receiver) |
| Operating Temperature | 0°C – 40°C |
| Humidity | 10% – 90% non-condensing |
| Color | White / Black (optional) |
| Certifications | CE, FCC, RoHS |
The T-7705B includes a built-in 2.4GHz digital wireless microphone receiver. The system operates in the license-free 2.4GHz band with automatic frequency hopping to avoid interference. Up to 4 microphones can be used simultaneously in the same room (additional mics optional). The microphone automatically pairs when powered on within range.
The T-7705B is a wall-mounted IP speaker that adds integrated 2.4GHz wireless microphone capability to the reliable T-7705 platform. It's designed for environments where a teacher, trainer, or presenter needs hands-free amplification without the clutter of wired microphones.
Integrated 2.4G Wireless Mic: The built-in receiver works with the included handheld or optional headset/lavalier microphone. Simply turn on the mic, and it automatically pairs with the speaker. The mic audio is mixed with other sources (network, USB, AUX) and can be set to priority mode, automatically ducking background music when the mic is active.
100V Analog Backup: Like the T-7705S, this model includes a 100V constant voltage backup input. If the network fails, the unit automatically switches to analog paging, ensuring life-safety announcements are never missed.
Cost-Effective Design: The T-7705B offers essential features at an attractive price point: stereo 20W amplification drives passive speakers directly, USB port for local MP3 playback, and 3.4" LCD for status and basic control.
Master/Standby Redundancy: The built-in master/standby switch enables fast failover (<0.3s) when paired with a second unit, ensuring continuous operation even if the primary amplifier fails.
Built-in receiver, automatic pairing. Handheld or headset options. Up to 30m range, 8+ hour battery.
Automatic switch to analog 100V paging during network failure. Ensures life-safety announcements are never missed.
<0.3s automatic switchover to backup unit. Hot-standby mode keeps audio synchronized.
Front-panel USB port for local MP3 playback. Ideal for background music or lesson audio.
| Parameter | Specification |
|---|---|
| Frequency Band | 2.4GHz ISM (license-free) |
| Modulation | Digital GFSK |
| Audio Bandwidth | 50Hz – 15kHz |
| Range | Up to 30m (line of sight) |
| Battery Type | Built-in rechargeable Li-ion |
| Battery Life | 8+ hours continuous use |
| Charging | Micro-USB (included) |
| Microphone Types | Handheld, headset, lavalier (optional) |
| Simultaneous Mics | Up to 4 per receiver |
Included: Handheld mic
Optional: Headset, Lavalier
Automatic pairing
Priority mode available
The wireless microphone can be configured in three priority modes via the T-7700RP software: Normal (mic mixes with other sources), Priority (other sources duck by -20dB when mic active), or Voice-Over (other sources mute completely when mic active). Ideal for classrooms and presentations.
| Model | Display | Amp | Wireless | Backup | Best For |
|---|---|---|---|---|---|
| T-7705B | 3.4" LCD | 2x20W | 2.4G mic | 100V | Classrooms, training |
| T-7705S | 3.4" LCD | 2x20W | No | 100V | Economic, backup focus |
| T-7705BG | 3.4" LCD | 2x20W | 2.4G + Bluetooth | 100V | Full connectivity |
| T-7705BM | 3.4" LCD | 2x30W | 2.4G + MP3 | 100V | Higher power |
| T-7705A | 4.3" TFT | 2x30W | Bluetooth + opt | No | Interactive classrooms |
| Feature | T-7705B (Wireless Mic) | T-7705S (Economic) |
|---|---|---|
| 2.4G Wireless Mic | Yes, built-in | No |
| Amplifier | 2x20W | 2x20W |
| 100V Backup | Yes | Yes |
| Master/Standby | Yes | Yes |
| USB Playback | Yes | Yes |
| Ideal For | Classrooms, training rooms | Budget installations, backup focus |
The 100V backup input is designed for analog 100V line-level signals from a traditional paging amplifier. Do not connect speaker-level outputs directly. The T-7705B's internal amplifier drives the speakers; the 100V input is just a signal source. Ensure backup amplifier volume is set appropriately.
The T-7705B supports up to 4 wireless microphones simultaneously. Ideal for panel discussions or multiple presenters. Each microphone can be configured with different priority levels. Additional mics available as optional accessories.
Server → PoE Switch → T-7705B (wall-mounted) → 2x 20W ceiling speakers
Teacher uses included wireless handheld mic (or optional headset). USB drive with lesson audio. Network provides school announcements and bell scheduling. 100V backup from analog paging amp ensures emergency announcements during network outage.