1. 3 key function "Call" "Pay" "Cancel"
2. 433Mhz 330K RF frequency
3. an effective working range of 200 Meters in open area
4. CE ROHS complianced
1. 3 key function "Call" "Pay" "Cancel"
2. 433Mhz 330K RF frequency
3. an effective working range of 200 Meters in open area
4. CE ROHS complianced
