G638 is a handheld inspection tool with three antennas, a ten-level LED signal indicator and a sound alert. Its parameter sheet lists RF reception from 300MHz to 2700MHz and a 1000mAh rechargeable battery. The pictured optical attachment offers a separate lens-check method when an RF sweep alone is inconclusive. Use the two checks together, then inspect any suspicious location directly.
| Model | G638 |
|---|---|
| RF range listed | 300MHz–2700MHz |
| Signal indication | Ten-level LED display and changing tone |
| Battery | Built-in 1000mAh rechargeable |
| Listed runtime | 8–12 hours |
| Body | ABS and aluminum alloy |
| Additional method | Optical lens check with pictured attachment |
Trace an active signal with the LED display
The three antennas and colored LED steps help show when a transmitting source grows stronger as the operator moves. Start with a known active device to see how G638 responds. In the inspection area, sweep slowly and watch for a repeatable rise from more than one direction. A phone, router or other ordinary transmitter can produce an alert too.
Use the controls to narrow the search
The front buttons sit beside the LED display and speaker opening. Increase or decrease the setting as the signal changes, then check the strongest spot at close range. The frequency range in the source sheet is 300MHz–2700MHz; do not treat an alert as proof of a particular device type or use it to claim coverage outside that range.
Check a lens with the optical attachment
The product photographs show a separate circular lens-check attachment. Hold it near eye level and scan slowly for a reflected point from a camera lens. This complements the RF test because a wired or switched-off camera may not transmit. Reflections from other shiny surfaces can look similar, so inspect any suspected point directly.
Power and inspection limits
G638 has a built-in 1000mAh battery. The parameter sheet lists eight to twelve hours of continuous operation. Charge the unit before a long sweep, and check the supplied charging parts on the sample. RF detection depends on an active transmission; the optical method depends on a visible lens and a suitable viewing angle. Neither method replaces a full physical inspection.
Wholesale price and sample checks
The four USD price bands below use the G638 cost in the supplied quotation. Before ordering, confirm the optical attachment, antennas, charger, manual language and packaging on an approved sample. Shipping and destination requirements are quoted separately.
| Order quantity | Reference unit price (USD) |
|---|---|
| 5–49 units | US$36.55 per unit |
| 50–199 units | US$35.85 per unit |
| 200–499 units | US$35.14 per unit |
| 500+ units | US$34.72 per unit |
Frequently Asked Questions
What signals can the Three-Antenna RF Detector with Optical Lens Check – G638 detect?
The Three-Antenna RF Detector with Optical Lens Check – G638 responds to active transmissions within the 300MHz–2700MHz range listed in its parameter sheet. The ten-level LED display and changing sound help an operator narrow a source. It cannot identify a switched-off device through RF alone, and nearby phones or routers may also trigger it.
How does the lens check on G638 work?
The Three-Antenna RF Detector with Optical Lens Check – G638 is pictured with a separate optical lens-check attachment. A reflected point of light may help an operator notice a camera lens during a close visual sweep. The optical check and RF sweep are different methods; neither guarantees that every concealed camera will be found.
How long does the G638 operate?
The Three-Antenna RF Detector with Optical Lens Check – G638 has a built-in 1000mAh rechargeable battery. Its source parameter sheet lists eight to twelve hours of continuous operation. The LED display, sound alert, battery condition and charging history can change real runtime. Charge and test a sample before an extended inspection.
How should the G638 be used in a room?
The Three-Antenna RF Detector with Optical Lens Check – G638 should first be checked against a known active transmitter. Move slowly around the room, watch the ten-level LED indicator and listen for the changing tone. Reduce sensitivity or move away from your own phone and router when background signals make a source difficult to isolate.
What should a wholesale buyer confirm for G638?
The Three-Antenna RF Detector with Optical Lens Check – G638 is shown with three antennas and an optical lens-check attachment. Before a bulk order, confirm the included attachment, charging cable, manual language and package on an approved sample. The displayed USD tiers are based on the G638 cost in the supplied price sheet; shipping is quoted separately.
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