DW21 Vintage Radio BT Speaker Support TF Card/U Disk to Play(Light Green) Filter-USB Cable RAM 1GB DDR3

RAM 1GB DDR3

and each time a suspicious signal is recorded

40HQ: 1842 cartons * 240 pcs = 442080 pcs

filtering noise in the background to make the conversation clearer

DW21 Vintage Radio BT Speaker Support TF Card/U Disk to Play(Light Green) Filter-USB Cable RAM 1GB DDR31. Function: BT, hands free calling, TF card playback, U disk playback, TWS FM 2. BT version: Jerry 5. 0 3. Battery capacity: 3. 7V 500mAh 4. Speaker: 4 3W 45MM 5. Effective distance: less than or equal to 10M 6. Playing time: 3 8 hours (depending on the playback volume) 7. Charging time: less than or equal to 2H 8. Frequency response range: 50HZ 18KHZ 9. Signal to noise ratio: greater than or equal to 80db 10. Input Output: DC 5V 1A 11. Material: