1. Okwu mmalite
The ISOtunes PRO 3.0 Bluetooth Hearing Protection Earbuds are designed to provide certified hearing protection while allowing for audio streaming and communication in noisy environments. This manual provides essential information for the proper setup, operation, and maintenance of your device.

Image 1.1: ISOtunes PRO 3.0 Bluetooth Hearing Protection Earbuds, Safety Orange variant, showcasing the earbuds, inline control panel, and connecting cable.
2. Ihe ngwugwu
Nyochaa na etinyere ihe niile edepụtara n'okpuru na ngwugwu gị:

Image 2.1: Visual representation of the ISOtunes PRO 3.0 package contents, including the earbuds, carrying case, USB-C charging cable, various eartips, and cable management clips.
- ISOtunes PRO 3.0 Earbuds
- USB-C eriri USB
- Akpa na-ebu
- 4 Pairs of Trilogy™ Foam Eartips (XS, S, M, L)
- 1 Pair of Silicone Triple Flange Eartips
- 2 Cable Management Clips
- 1 Mpekere Alligator
3. Ozi nchekwa dị mkpa
The ISOtunes PRO 3.0 earbuds are designed for hearing protection. Adhere to all safety guidelines to ensure proper function and personal safety.
- Nkwekọrịta OSHA: These earbuds are OSHA approved and feature an ANSI-certified Noise Reduction Rating (NRR) of 27 dB. The SafeMax volume limit is set to 85dB to protect against hearing damage.
- Kwesịrị ekwesị: Achieving the stated NRR requires a proper seal. Refer to the eartip selection and insertion guide for optimal fit.
- Mmata gburugburu: While providing hearing protection, always remain aware of your surroundings, especially in hazardous environments.

Image 3.1: A diagram illustrating the correct method for rolling and inserting foam eartips into the ear canal, alongside a chart detailing various noise levels and their potential for hearing damage.
4. Akụrụngwa Ngwaahịa
The ISOtunes PRO 3.0 offers a range of features designed for demanding work environments:

Image 4.1: A graphic summarizing the key features: OSHA compliance, Bluetooth 5.4 with LE Audio and Auracast, 27 dB NRR, IP67 dust/sweat/waterproof rating, up to 20-hour battery life, and military-spec drop test durability.
- Certified Hearing Protection: ANSI-certified 27 dB NRR and SafeMax 85dB volume limit.
- Ihe owuwu na-adịgide adịgide: IP67 dust and waterproof rating, tested to military drop & shock standards (MIL-STD 810H), aramid-reinforced cables.
- Ndụ batrị agbatịkwuru: Up to 20 hours of use on a single charge, with USB-C fast charging.
- Ọdịda dị oke mma: Custom-tuned full-range dynamic drivers for clear sound.
- Njikọ dị elu: Bluetooth 5.4 with Low Energy (LE) Audio and Auracast support, dual pairing, and 2-way radio compatibility.

Image 4.2: Demonstrates the versatility of the ISOtunes PRO 3.0 earbuds in different work environments such as outdoor power equipment operation, manufacturing, woodworking, and construction.
5. Ntuziaka Nhazi
5.1 Charging Your Earbuds
Before first use, fully charge your ISOtunes PRO 3.0 earbuds.
- Locate the USB-C charging port on the inline control panel.
- Connect the provided USB-C cable to the port and the other end to a compatible USB power source.
- The LED indicator on the control panel will show charging status. A full charge takes approximately 1.5-2 hours. A 10-minute quick charge provides approximately 2 hours of listening time.
5.2 Eartip Selection and Insertion
Proper eartip selection and insertion are crucial for optimal hearing protection and sound quality.
- Họrọ nha nke ziri ezi: Experiment with the included Trilogy™ foam eartips (XS, S, M, L) and silicone triple flange eartips to find the size that provides a snug, comfortable fit and a good seal in your ear canal.
- Foam Eartip Insertion: Roll the foam eartip into a tight, creaseless cylinder. Insert the compressed eartip into your ear canal and hold it in place for 5-10 seconds while it expands to create a seal.
- Silicone Eartip Insertion: Gently push the silicone eartip into your ear canal until it forms a comfortable seal.
5.3 Njikọ Bluetooth
To connect your ISOtunes PRO 3.0 to a Bluetooth-enabled device:
- Ensure the earbuds are powered off.
- Press and hold the multi-function button on the control panel until the LED indicator flashes blue and red, indicating pairing mode.
- Na ngwaọrụ gị, gbanye Bluetooth ma chọọ ngwaọrụ dịnụ.
- Select "ISOtunes PRO 3.0" from the list.
- Once connected, the LED indicator will flash blue periodically.
6. Operating Your ISOtunes PRO 3.0

Foto 6.1: nkọwa zuru ezu view of the ISOtunes PRO 3.0 earbuds and the inline control panel, showing the buttons for power, volume, and multi-function.
6.1 Gbanyụọ ma ọ bụ gbanyụọ
- Ike Na: Press and hold the multi-function button for 3 seconds. The LED will flash blue.
- Gbanyụọ: Press and hold the multi-function button for 5 seconds. The LED will flash red and then turn off.
6.2 Njikwa oku
- Azịza/Kwụsị Oku: Pịa bọtịnụ ọtụtụ ọrụ otu ugboro.
- Jụ oku: Pịa ma jide bọtịnụ ọtụtụ ọrụ maka sekọnd 2.
- Enyemaka Olu: Double-press the multi-function button to activate your device's voice assistant.
6.3 Nghaghachi egwu
- Gwuo/kwụsịtụ: Pịa bọtịnụ ọtụtụ ọrụ otu ugboro.
- Track na-esote: Press the volume up (+) button for 2 seconds.
- Gara aga Track: Press the volume down (-) button for 2 seconds.
6.4 Njikwa olu
- Dịkwuo Mpịakọta: Pịa bọtịnụ olu elu (+).
- Belata Mpịakọta: Pịa bọtịnụ olu ala (-).
6.5 Dual Pairing and 2-Way Radio Compatibility
The PRO 3.0 supports dual pairing, allowing connection to two Bluetooth devices simultaneously. It also offers compatibility with 2-way radios for enhanced communication in professional settings. Refer to your 2-way radio's manual for specific pairing instructions.
7. Nlekọta na nlekọta
- Nhicha: Regularly clean eartips with a damp cloth. For foam eartips, replace them when they become dirty or lose their elasticity. The earbuds themselves can be wiped with a soft, dry cloth. Do not use harsh chemicals.
- Nchekwa: Store the earbuds in the provided carrying case when not in use to protect them from dust, moisture, and physical damage.
- Mkpughe mmiri: While IP67 rated, avoid prolonged submersion. Ensure the USB-C port cover is securely closed before exposure to water or dust.
8. Nchọpụta nsogbu
| Nsogbu | Ihe nwere ike ime | Ngwọta |
|---|---|---|
| Earbuds anaghị agbanye ọkụ | Batrị dị ala | Charge the earbuds using the USB-C cable. |
| Enweghị ike ijikọ na ngwaọrụ | Earbuds not in pairing mode; Device Bluetooth off; Out of range | Ensure earbuds are in pairing mode (flashing blue/red). Turn on device Bluetooth. Move device closer to earbuds. |
| Poor sound quality or low volume | Improper eartip fit; Low battery; Source audio quality | Adjust eartips for a secure seal. Charge earbuds. Check audio source quality. |
| Njikọ na-adịte aka | Interference; Out of range; Low battery | Move away from other wireless devices. Reduce distance to paired device. Charge earbuds. |
9. Nka na ụzụ nkọwa
| Njirimara | Nkọwapụta |
|---|---|
| Aha Nlereanya | PRO 3.0 |
| Nọmba Nlereanya ihe | IT-21B |
| Oke Mbelata mkpọtụ (NRR) | 27 dB |
| SafeMax Volume Limit | 85 dB |
| Ụdị Bluetooth | 5.4 (with LE Audio & Auracast support) |
| Ndụ batrị | Ruo awa 20 |
| Oge Nchaji | Approx. 1.5-2 hours (10 min quick charge for 2 hours use) |
| Nchaji ọdụ ụgbọ mmiri | USB-C |
| Ọkwa Nguzogide mmiri | IP67 (Dust, Sweat, and Waterproof) |
| Ọkọlọtọ Ịdịgide | MIL-STD 810H (Military Drop & Shock) |
| Oke ugboro ugboro | 20 Hz - 20,000 Hz |
| Mgbochi | 32 Ohm |
| Ibu Ibu | 8.1 ounces |
| Akụkụ ngwaahịa | 4.75 x 4.5 x 2.25 sentimita asatọ |
| UPC | 850045924232 |
10. Akwụkwọ ikike na nkwado ndị ahịa
ISOtunes products are backed by a manufacturer's warranty. For specific warranty details, registration, or to contact customer support, please visit the official ISOtunes website or refer to the warranty card included in your product packaging. You may also reach out to the seller directly for assistance.





