PTR Series Sonic Electric Toothbrush: PTR-C4, PTR-C8 & PTR-C9S IPX7 Waterproof Type C Rechargeable Toothbrush With Dupont Soft Bristles

Our upgraded PTR oral care lineup covers three hot-selling models: PTR-C4 single-button 5 modes sonic toothbrush, flagship PTR-C8 dual-button 15 modes electric toothbrush with kids lock, and lightweight minimalist PTR-C9S 3 modes travel toothbrush. All three models adopt 2000mAh 18650 lithium battery, universal Type-C DC 5V 1A charging, full IPX7 waterproof rating and premium USA Dupont soft bristles, certified by CE, FCC, RoHS and FDA for safe daily teeth cleaning for adults with sensitive gums, plaque buildup or whitening demands.

Universal Core Advantages Shared by PTR-C4 / PTR-C8 / PTR-C9S

• IPX7 Full Waterproof Rating – Entire handset can be immersed in 1m deep water for 30 minutes without internal water ingress, safe for direct running water rinse after brushing; avoid long-time steam shower use to protect internal circuits.
• Premium Replaceable Dupont Brush Heads – Soft rounded bristles reduce gum irritation, single bundle pull force ≥1.5kgf, resistant to deformation & discoloration after 14 days soaking in toothpaste or 10 mins in 65°C hot water.
• 2000mAh Large Capacity Battery – Full charging takes over 4 hours, continuous working time up to 6 hours, drastically cut frequent charging trouble for home & travel use.
• Standard 2-Minute Smart Timer – Auto 30-second zone reminder with 0.25s pause to evenly clean 4 oral quadrants, extra 2.5min long cycle for whitening mode.
• Ultra Low Noise Design ≤60dB – Tested with or without brush head under 49dB background noise, quiet brushing without disturbing family members early morning or late night.
• Complete Multi-Layer Battery Protection – Built-in protection board with over-charge, over-discharge, over-current and short-circuit protection; auto power off during charging to avoid circuit damage.

Difference Between PTR-C4, PTR-C8 and PTR-C9S For Different Users

PTR-C4: Single Button 5 Modes Basic Household Sonic Toothbrush

Designed for users who prefer simple one-key operation, the PTR-C4 rechargeable sonic toothbrush only has one control button with 5 complete cleaning cycles: Clean, Gentle, Massage, Whitening, Polish. It features red charging indicator light and green full-charge reminder, mode memory function saves your last-used setting. Vibration frequency ranges from 285Hz to 294Hz, stable 34200-35280 RPM motor speed for daily deep plaque removal. Net weight only 135.2g, compact body fits most bathroom storage spaces.

PTR-C8: Dual Button 15 Modes Premium Toothbrush With Kids Lock & 3 Power Indicators

Flagship high-end model PTR-C8 sonic electric toothbrush comes with two independent buttons (power button + intensity button), delivering 5 core cleaning modes each with 3 adjustable vibration strengths (Strong / Medium / Weak), total 15 customizable working modes. Unique child lock function prevents accidental operation by kids: long press two buttons for 3 seconds to lock/unlock all mode & intensity functions. Three white LED power lights display real-time battery level during charging, supporting gradient charging reminder from low voltage to full power. Vibration speed adjustable between 31560RPM to 35280RPM, ideal for gift box sets and high-end oral care retail.

PTR-C9S: Minimalist Single Button 3 Modes Lightweight Travel Toothbrush

If you travel frequently and want a compact easy-to-use toothbrush, PTR-C9S lightweight sonic toothbrush is your top pick. Simplified to 3 practical modes: Clean, Gentle, Whitening, single button control for quick switching. Ultra-light total weight 135.2g, slim vertical body will not roll over on a 10° slope, easy to put into travel bags, cosmetic cases or hotel travel kits. Red charging indicator light, mode memory and low voltage vibration reminder are fully equipped, perfect for short trips, business travel and daily simple oral care.

Unified Intelligent Functions Across All PTR Models

1. Mode memory system: If you stay on a mode over 5 seconds before power off, the toothbrush will automatically restore this mode on next startup; if you switch modes and shut down quickly, it will default back to Clean mode.
2. Low voltage charging reminder: When battery voltage drops below 3.5V, red light flashes and vibrates 3 times on startup & shutdown to remind charging; auto shut down when voltage under 3.0V, recharge above 3.3V to restart.
3. Charge lock protection: The toothbrush cannot turn on while charging, and will auto stop working if you plug in the Type-C cable during brushing.
4. Factory QC test mode: Long press power button for 8 seconds under power-off state to enter continuous vibration aging test mode for quality inspection.

Rigorous Factory Quality Testing Standards

Every PTR-C4, PTR-C8 and PTR-C9S electric toothbrush undergoes strict quality inspection before shipment: 1m height 3-cycle drop test, 20,000 times switch service life test, 300 cycles battery charge-discharge aging test, 18-hour continuous brush head load test, IPX7 30-minute deep water immersion test, and bristle pull force & high temperature resistance test. All products pass global safety certifications CE, FCC, RoHS and FDA, fully compliant for cross-border e-commerce sales worldwide.

Who Should Choose Which PTR Sonic Toothbrush?

Pick PTR-C4 if you want full 5 cleaning modes with simple single-button operation for daily family use at affordable cost.
Choose PTR-C8 if you need customizable vibration intensity, kid lock safety function and real-time three-light power display for premium gift sales and multi-scene oral care.
Select PTR-C9S for lightweight, compact travel use with simplified 3 core modes, ideal for business trips, hotel supplies and portable daily brushing.

Maintenance Tips For IPX7 Sonic Electric Toothbrush

1. Full charging needs at least 4 hours; do not charge overnight continuously to extend battery service life.
2. Rinse the handset and brush head under running water after each use, place in dry ventilated place, avoid long-time hot steam shower environment.
3. Replace Dupont brush head every 3 months to maintain optimal cleaning effect and reduce bacterial accumulation on bristles.
4. Do not pull the brush head out with excessive force; standard removal force ranges from 1.0kgf to 4kgf to avoid damage to the connection part.