Bluetooth alarm speaker - two batteries - Black - Upgrade style - 5W

Overall dimension: 143x33x50mm
Bluetooth function: Bluetooth + ESR effective transmission = 10m
Battery type: detachable high-capacity rechargeable battery
Battery capacity: 1400max2 (optional)
Product material: plastic / PC lens
Product horn: 40mm strong magnetic horn
Main functions: Bluetooth music / collection broadcast / time display / alarm clock reminder / temperature display