High-Quality Spy Pen with Enhanced Microphone and add colors

I am looking for a high-quality spy pen with a microphone for my business. I am currently selling a similar product but experiencing a high return rate (around 10%) due to two main issues:

Product Requirements & Issues to Solve
1️⃣ Microphone Quality

Needs better noise reduction to minimize background noise.
Higher voice recording clarity without distortion.
Must be more durable and not stop working after a few uses.
2️⃣ Pen Tip & Writing Quality

The pen should write smoothly with high-quality ink.
It must be quiet when writing, without excessive scratching noises.
The tip should not create an unpleasant feeling or be too rough.
RFQ Details
Order Volume: Initial test order of 300 units, with potential for larger recurring orders.
Customization: Open to modifications with better quality.

Certifications Required: [If applicable, mention CE, RoHS, FCC, etc.].
? Can you provide a higher-quality microphone and a smoother pen tip?
? Do you have any upgraded models that solve these issues?

Please send me your product catalog, pricing, MOQ, and lead time. If customization is possible, let me know the options available.

Looking forward to your response.