1) Product Overview
+Product name: Voice Buddy – children's helmet (bicycle/kid helmet, no big battery – only uses mini recording chip).
+ Purpose: Protect the heads of children 6-10 years old when riding bicycles/scooters; at the same time, it allows recording and playing funny messages (greetings, recognition sounds) so that children can mark their own helmets and increase connection with friends.
2) Size & Form
+ Head circumference: 50 – 54 cm (standard for children 6-10 years old).
+ Length (forehead → nape): 24 – 26 cm.
+ Width (ear → ear): 18 – 20 cm.
+ Crown height: 13 – 15 cm.
+Brim: 3.5 – 4.5 cm (can add ~0.3 cm to the nape area due to the chip compartment).
+Foam cushion: 1.5 – 2.0 cm thick, many holes Ø 0.8–1.0 cm for ventilation.
+Target weight: 230 – 260 g (including chip & speaker).
3) Materials
A. Outer shell
+ Polycarbonate (PC) in-mold or ABS hardshell.
+ Surface coated with UV-stable paint, non-toxic paint, optional logo/pattern printing.
B. Impact absorbing layer (Liner)
+ EPS (Expanded Polystyrene) density 40–80 kg/m³, thickness 15–30 mm, meeting EN1078 standards.
C. Inner padding (Comfort pads)
+ Antibacterial moisture-wicking fabric (CoolMax/bamboo-blend), removable for hand washing.
D. Retention system
+ 12–15 mm nylon strap, side-release buckle (polyacetal/nylon).
+ Ratchet dial adjustment ring or simple zipper for a snug fit.
4) Recording – sound playback feature
+ 5-second recording chip + mini speaker located in the rear compartment of the helmet (light waterproof cover).
+ Children gently touch the touch icon to play the recorded sound (greeting, laughter ...).
+ Use CR2032 button battery or small rechargeable battery, operating time 2–3 weeks/cycle.
+ Separate circuit, anti-electric shock, meets RoHS standards for electronic safety for children.
5) Inspection & Standards
+ Impact test: free fall on flat anvil/kerbstone (according to EN1078).
+ Retention & strap strength: check the strength of the strap and buckle.
+ EMC & safety test for chip/speaker: ensure no harmful radiation and no burning/heating.
+ Field-of-vision: ensure the vision is not blocked by the chip compartment.
6) Lifespan & Warranty
+ Recommended period: replace after 3–5 years or after a strong impact.
+ Recording chip/speaker: average lifespan 2–3 years, easy to replace battery.
+ Warranty: 12 months for electronic circuits and recording components.