▶ Package included: 1pack (10pcs) AG5 Batteries | ▶ Diameter: approximately 7.9mm / 0.31 inches. It provides excellent continuous power. High energy density, long lifespan. | ▶ Attention: Please keep batteries in dry and cool place; Do not recharge or dispose off in fire; Insert the battery in right direction and avoid short-circuit. | ▶ It can also be known as: AG5, D309, D393, G5, G5A, L754, LR48, LR754, RW28, SR48, SR754, SR754W, 15, 48, 193, 309, 393, 546, 309-1 W, 393-1 W, 393A | ▶ Usage: laser pointers Watches calculators computers and digital cameras cameras PDAs remote controls cameras electronic games instruments MP3 players digital voice recorders Toys blood glucose, glucose test meters, hundreds of other electronic products

▶ Light and compact, with a key chain, easy to carry No additional driver installation required | ▶ Card Compatibility: MICRO SD/SDXC/TF card. After testing, support 512GB, plug in TF card can be used directly as a USB flash drive | ▶ Fast speed: in line with 2.0 specification, fast data transmission rate for reliable copy/download/backup. | ▶ Powers via USB port, no additional power supply needed. Anti-magnetic, anti-vibration, moisture-proof, high and low temperature resistant, and resistant to hitting. | ▶ Compatible for Windows ME,2000,XP,Vista,WIN 7 and Mac OS with USB interface