Dimension:5.7x15cm Crust:adopts thermoplastic ABS resin,adopt high-precision gear assembly. NI-B magnetic ring. which can be charged fast illuminations:5LED illumination brightness of each:100000-12000mcd Batteries:3 chargeable storage.1.2V. 70mA The switch has three stages. swiveking up for illumination of 1 lamp. swiveling down for illumination of 5 lamps keep in the middle to turn it out 1-lamp type: illuminate for 30 minutes after 1 miuntes's pressing(160 times) illuminate for 5-6 after fully charging of the storage 5-lamp type: illuminate for 6 minutes after 1 miuntes's pressing(160 times) illuminate for 1-2 after fully charging of the storage Can charge the mobile phone under urgent situation and with alarm whistle during stop