1. Net weight: 665 grams
2. Dimensions: 476x343x14.3 mm
3. Battery model: CR2430
4. Diaphragm material: flexible liquid crystal film
5. Diaphragm reflectivity: 25-30%
6. Input pressure: 100-200 grams
7. ABS reinforced frame design, aluminum alloy back panel design, firm edges, wear-resistant and durable
8. Green material, safe and environmentally friendly, children can use it with confidence