Product name: helicopter bluetooth speaker

Material: ABS engineering plastic + silica gel
Built-in battery: 3.7v-4.2v 400mAh
Charging current: 5v0.8a (Max) about 1.5 hours full
Charging method: micro-usb port 5V1A
Output power :≤2W
Endurance: more than 6 hours
Bluetooth version :5.0
Transmission distance: > 50m
Volume adjustment: external potentiometer/mobile phone (both can adjust volume synchronously)
Frequency response range: 80hz-20khz
Horn specifications: 4 Ω 3 w
Applicable area :≤10m2
Product size :71*54*68mm
Product weight :120g
Package size :92*90*60mm
Packing quantity :40 PCS