1 Detector Pen. Optical lens: dedicated filter. Signal detection range: 5cm-10m. Laser detection distance: 10cm-15m. We usually respond within 24 hours. We will reply you ASAP.
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Distance between GSM phone and earpiece:20-50cm. --Pen weight:G.W 55g,N.W 25g;Earpiece:G.W 5.8g,N.W0.8G. This item only GSM Pen transmitter. One GSM Pen transmitter supports multiple earpieces. You may using two earpieces with one pen to get better listening effects.
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2 pr 4pcs x Invisible Ink Pen. Fine point marker, is loaded with special ink that is only visible under UV light. Students can use the pen mark important information in the text books, in order to more efficient to complete the review your lessons.
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UV light pen with violet LED on the lid. Invisible Pen brings you a variety of fun activities like treasure hunts. UV Light Pen. You can write anywhere: T-shirts, paper, skin. Permanent but washable.
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(Batteries Included) 🚨. ThisInvisible Ink Spy Pen lets you sendsecret notes thatonly appear under UV light ! ✅ 1xInvisible Ink Spy Pen (UV light built-in). 🎯 WHY BUY THIS SPY PEN?. ✔BUILT-IN UV TORCH – Reveals hidden ink instantly (batteries included! ).
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UV Light Pen Invisible Ink. Invisible/Secret ink pen & built in UV light. You can write or draw on skin but we do advise you to test it out on a small patch first to ensure it does not cause you any problems.
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UV light is also useful for detecting counterfeit bank notes. Simply use the pen to make a distinguishing mark and use the UV light to make checks. Invisible ink pens are great for marking all kinds of surfaces and applications, especially paper.
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Playback and download files in seconds to phone & playback, save or share it. When sound is heard it can send push notification to alert you. Pair to wifi in seconds, super easy set up. 1 x AR-06 Wi-Fi audio recorder.
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