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Spider ATAN435B Button Cell Audio Transmitter
The MAXSUR Spider is a compact analog body-wire transmitter for authorized law-enforcement and government operations. Its low-profile enclosure, built-in Knowles microphone and integrated button-cell holder create a simple, highly concealable package that can provide more than 24 hours of published operating time.
Mission Advantages
Spider concentrates the essential elements of an analog body wire into a compact, battery-ready transmitter for missions where low bulk, long runtime and straightforward deployment take priority.
At approximately 1.1 x 0.79 x 0.31 inches, Spider can be placed in clothing, a pocket or an appropriate mission-specific concealment with minimal equipment carried by the source or undercover operator.
The CR2032 holder is integrated into the transmitter, eliminating a separate external battery pack and allowing the battery to be installed or replaced in the field.
Published current consumption below 5 mA supports more than 24 hours of operation from a single 3 VDC CR2032 lithium battery under stated conditions.
A built-in, field-proven Knowles microphone combines the audio pickup and transmitter in one compact assembly without requiring a separate external microphone.
Wideband FM transmission can be monitored with properly configured compatible multiband receiver equipment and an antenna selected for the operating frequency.
The published standard frequency is 443 MHz. Custom-frequency units may be available subject to agency requirements, authorization and minimum order quantities.
Integrated Button-Cell Power
Spider's CR2032 holder is built directly into the transmitter body. The battery becomes part of the compact assembly, helping reduce cables, carried components and preparation complexity.
The transmitter is enabled by installing the battery. The supplied package includes two CR2032 lithium cells so the agency can deploy with a replacement available.
Low-Profile Deployment
The compact transmitter body is only 0.31 inches deep and weighs approximately 0.24 ounces with its battery installed. That small physical signature gives agencies flexibility to place Spider in a pocket, beneath clothing or within a mission-appropriate concealment.
Its integrated microphone and battery holder keep the deployed system straightforward. The attached 6.3-inch wire whip should be placed carefully because antenna routing, proximity to the body and the surrounding environment directly affect RF performance.
Undercover Applications
Spider can support appropriately authorized missions such as:
Analog Simplicity
Spider is intentionally uncomplicated. Install the button-cell battery, place the transmitter and antenna appropriately, and monitor the configured WFM signal with compatible receiver equipment. For agencies that already maintain an analog monitoring workflow, the design offers a compact path to live covert audio without a separate body-worn battery pack.
Range and Receiver Planning
The specification sheet publishes approximately 1.1 miles of line-of-sight range and approximately 900 feet through residential construction when used with compatible multiband receiver equipment and a rubber whip antenna.
Those figures describe favorable test or reference conditions—not guaranteed operational coverage. Actual performance varies with transmitter concealment, body loading, antenna routing, receiver sensitivity, receiving antenna, structures, vehicles, terrain, interference and local RF conditions.
Technical Overview
The specifications below are based on the supplied Spider documentation. MAXSUR will confirm the current frequency, receiver compatibility, included accessories and final configuration in the official quotation.
| Specification | Published Detail |
|---|---|
| System model | Spider ATAN435B |
| Primary function | Miniature button-cell wireless audio transmitter / analog body wire |
| Frequency band | UHF; 443 MHz published standard frequency |
| Custom frequency availability | May be available subject to agency requirements and minimum order quantity |
| Modulation | Wideband FM (WFM) |
| RF output power | +4 dBm |
| Published range | Approximately 1.1 miles line of sight and 900 ft. through residential construction under referenced conditions |
| Microphone | Built-in Knowles-brand microphone |
| Antenna | 6.3 in. (160 mm) wire whip |
| Power requirement | 3 VDC |
| Power source | One CR2032 lithium button-cell battery |
| Current consumption | Less than 5 mA at 3 VDC |
| Published operating time | More than 24 hours under stated conditions |
| Transmitter dimensions | 1.1 x 0.79 x 0.31 in. (28 x 20 x 8 mm) |
| Transmitter weight | Approximately 0.24 oz. (7 g) with battery |
| Published warranty | 1 year |
Specifications are subject to change. Published range and runtime are not guaranteed in every deployment. Frequency, compatible receiver equipment, warranty and included items should be confirmed in the official MAXSUR quotation.
Included Equipment
Buyer Questions
Spider combines the transmitter, Knowles microphone and CR2032 battery holder in a package measuring approximately 1.1 x 0.79 x 0.31 inches. It weighs about 7 grams with the battery installed and provides more than 24 hours of published operation.
Spider is an analog wideband FM transmitter. Agencies requiring encrypted digital transmission, remote control or onboard recording should consider another MAXSUR body-wire system matched to those requirements.
No receiver is listed in the supplied specification sheet. The package includes the transmitter, two CR2032 batteries, a waterproof carrying and storage case, an operating guide and the published warranty. Compatible monitoring receiver equipment is required.
The supplied documentation states that the built-in CR2032 holder enables quick activation by installing the battery. Agencies should follow the current operating guide and confirm procedures with MAXSUR before deployment.
The published runtime is more than 24 hours under stated conditions. Actual runtime varies with battery quality, battery condition, temperature, storage history and operating circumstances.
The sheet publishes approximately 1.1 miles line of sight and approximately 900 feet through residential construction under referenced conditions. Actual range varies with concealment, antenna placement, body loading, receiver and receiving antenna, terrain, structures, vehicles and RF interference.
The documentation states that custom-frequency units may be available with a minimum order quantity. MAXSUR will confirm current availability, receiver compatibility and any authorization requirements for the agency's intended configuration.
No onboard recorder is identified in the Spider documentation. Spider transmits live analog WFM audio. Consider Hornet when the mission requires simultaneous encrypted transmission and recording at the body-worn transmitter.
The Spider is intended for authorized law-enforcement, government and qualified public-safety customers. MAXSUR will confirm customer eligibility, operating frequency and final system configuration before sale.
Agency Pricing and Configuration
Tell the MAXSUR team about your agency, operating environment, required frequency, existing receiver equipment and concealment needs. We will help confirm whether Spider is the right fit, configure the monitoring system and provide an official quotation.
