Digi-Wave 400 Series Tour Guide System for one guide and up to 23

The Digi-Wave 400 Series rechargeable tour guide system is a portable wireless communication system for one guide and as many as 23 listeners. The guide communicates through a DLT 400 transceiver, while the audience uses compatible DLR 400 RCH rechargeable receivers. Operating in the 2.4 GHz ISM band with frequency-hopping spread spectrum, the system is designed around mobile, one-to-many spoken communication.

Ideal Use Cases

This configuration is intended for tours in which a single guide needs to address a defined group of up to 23 people. Its portable format supports movement during a tour, while individual rechargeable receivers provide each listener with a direct connection to the guide’s audio. The operating range is rated at up to 900 ft (274 m), depending on environmental conditions, accommodating groups that may spread out over distance.

Battery life is specified at up to 32 hours per charge in one-channel receive mode. Auto Sleep Mode activates after five minutes without an RF signal from compatible devices, helping manage power during pauses and between active transmissions.

Why Choose This Model

The defining feature of this model is its 23-listener capacity paired with rechargeable receivers. It uses DLT 400 and DLR 400 RCH hardware and offers an approximately five-hour charging time. The listed charging system accommodates 12 units and provides 5 VDC at 0.5 A per charging bay. Charge-status indicators on the DLT or DLR make device status visible during preparation.

Wireless communication is protected through available 87-bit encryption for 300 Series compatibility, 87+128-bit encryption, an encryption PIN, and a settings lock. These controls give operators several ways to manage access and preserve an established system configuration.

Installation and Integration

The system operates from 2402 to 2476 MHz in the 2.4 GHz ISM band using FHSS. Compatible equipment includes the DLT 400 transceiver and DLR 400 RCH receiver. Additional receiver compatibility is listed for the DLR 400 ALK, DLT 300 with some limitations, and DLR 360 with some limitations.

USB-C supports charging as well as adjustable-level line input and line audio output. Charging connections include USB-C and two contacts for use with the CHG 412. The universal DC adapter provides 5 VDC at 6 A with center-positive polarity, while the specified TFP 066 input accepts 90-240 VAC at 1.5 A maximum.

The microphone section includes an internal microphone that is disabled when the microphone jack is engaged. The 3.5 mm microphone connection supplies electret microphone bias and offers adjustable gain across a 63 dB range. A 3.5 mm TRRS headphone jack supplies 25 mW into 32 ohms.

Performance Highlights

The system’s audio frequency response is specified as 100 to 7,200 Hz in Intercom Mode and 100 to 11,500 Hz in other modes. Signal-to-noise ratio is rated at 73 dB A-weighted, with total harmonic distortion listed at 0.1 percent at default volume and 1 kHz. RF output reaches 19 dBm maximum, and FSK modulation is used for wireless transmission.

Side tone is set 6 dB below volume, with Off, Low, and High tone settings available. Visual feedback includes a red LED around the Talk button when enabled and a bi-color green and red LED at the top. The stated operating-temperature range is 14 to 113 degrees Fahrenheit (-10 to 45 degrees Celsius).

What Makes It Different

This system combines long rechargeable runtime, a specified range of up to 900 ft, and encrypted 2.4 GHz communication in a configuration sized for one guide and 23 listeners. The rechargeable design is supported by smart charging built into the transceiver’s 1800 mAh lithium-polymer battery system.

The published enclosure specification identifies black ABS plastic with a metal base, while the case material is also listed as black ABS plastic. Overall dimensions are 26.2 inches long by 19.7 inches wide by 13.2 inches high, with a listed weight of 23 pounds. Approvals include CE, FCC, WEEE, RoHS, and CB.

Final Assessment

The Digi-Wave 400 Series system is a focused choice for guided communication involving one leader and up to 23 listeners. Its rechargeable receivers, up to 32-hour battery specification, approximately five-hour charge time, FHSS wireless operation, encryption options, USB-C connectivity, and environmental range of up to 900 ft provide a clearly defined technical platform for repeat tour use.