Manufacturer: Xiaomi Roidmi Model: Mojietu 3S Weight: 3.1 g Size: 6.1 x 2.6 x 2.6 cm Bluetooth: 4.2 USB Power Supply: 5 V / 2.4 A Smart App: Yes Fast Charging: Yes Dual Device Charging: Yes

Purpose: watches, hearing aids, calculators, wall clocks, measuring instruments, telecommunications equipment

High capacity battery 3450mAh, it is an ideal power source for e-bikes and other large capacity packs.