DD1557H DF repeater is used for To extend and strengthen radio signals for better coverage, so it's good for larger
and multi storey house, so you do need to purchase extra wifi additional wifi bridge or remote. Please note: this DD1557H RF repeater only used for Bi-directional devices.
Input voltage: USB DC5V
Radio Frequency: 433.925MHz Bi-Directional
Working current: ≤20mA
Working temperature: -5℃ ~ 50℃
Transmission Distance : Open outdoor: 200m, Indoor : 35m