Technical parameters A. Product model: RBL-125 Frequency: 125KHz Support card types: EM4100, EM4102, TK4100, TK4102 and compatible chip Reader mode: active and passive type reader Communication Interface: Wireless Bluetooth; USB Operating voltage: 950mAh, DC3.7-4.2V (built-in rechargeable lithium battery) Power consumption: < 0.8w Read Distance: Button type > 5cm, card > 15cm Bluetooth Transmission Distance: 10-15m Charging voltage: AC 110-240V, 50/60Hz …