ABS shell Two LED, lightness 20000mcd LIR2032, 3.6V, 40mAH No need to change the battery, solar power. Weight:20.0 g 1.ABS shell2. Two LED, lightness 20000mcd3. LIR2032, 3.6V, 40mAH4. It can be recharged at least 500 times for normally use.5. No need to change the battery, solar power.6. Easy to carry , metal key chain 7. Size: 5*4.4*1.5CM 8. weight:20.0 g light key chain