Retekess T128 Watch Receiver with 20 Call Buttons & USB Cable – Reliable Communication Color:White So it can be convenient

So it can be convenient to replace earphones

Observation of Jupiter’s clouds

5mm eye relief and is best without glasses

94% transmission at 486nm (H-beta)

The carry-case design keeps transmitters

Retekess T128 Watch Receiver with 20 Call Buttons & USB Cable – Reliable Communication Color:White So it can be convenientProduct description T128 watch receiver Working frequency: 433 MHz Decoding: learn the code Working voltage: DC 3. 7V Battery capacity 400mAh Size: 252 x 46 x 18 mm Weight 43. 8 g Model: TD017 Modulation: AM Coding method: 1527 Voltage: 3 V Standby power consumption: <0. 2 uA Battery: CR2032 * 2 Battery: 210mAh Package 1 * T128 watch 1 * USB cable 20 * TD017 call button 20 * Stickers Safety Warning Before using this calling system, read this guide